diff --git a/build/config/mac/BUILD.gn b/build/config/mac/BUILD.gn
index 38f36d4af4852a72fd5d319626fe5b51208eea5c..b57a43feab9e3b1ac25841b761443bb67a64e18b 100644
--- a/build/config/mac/BUILD.gn
+++ b/build/config/mac/BUILD.gn
@@ -1,6 +1,4 @@
 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 
 import("$build_root/config/mac/mac_sdk.gni")
 import("$build_root/config/mac/symbols.gni")
diff --git a/build/config/mac/mac_sdk.gni b/build/config/mac/mac_sdk.gni
index 1d89e43363717ce9a396b2ed33822c1d4542be8b..0e9b3cef3b79700095d18c9617bb356fa8dbec52 100644
--- a/build/config/mac/mac_sdk.gni
+++ b/build/config/mac/mac_sdk.gni
@@ -1,6 +1,4 @@
 # Copyright 2014 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 
 import("$build_root/config/mac/mac_sdk_overrides.gni")
 import("$build_root/toolchain/toolchain.gni")
diff --git a/build/config/mac/mac_sdk_overrides.gni b/build/config/mac/mac_sdk_overrides.gni
index 36326786afcb2879a5d703500227cc6c0786b8ee..49dfdcca1767b05e588348a3bae94e565fe88dce 100644
--- a/build/config/mac/mac_sdk_overrides.gni
+++ b/build/config/mac/mac_sdk_overrides.gni
@@ -1,6 +1,4 @@
 # Copyright 2017 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 
 # This file contains arguments that subprojects may choose to override. It
 # asserts that those overrides are used, to prevent unused args warnings.
diff --git a/build/config/mac/sdk_info.py b/build/config/mac/sdk_info.py
index 97ad4f5415fa1d9991aed1aa61c0b0c28ca82583..629ab6d384978fa444e29ae806f872fc1e6b58c5 100755
--- a/build/config/mac/sdk_info.py
+++ b/build/config/mac/sdk_info.py
@@ -1,8 +1,6 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # Copyright 2014 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 
 import argparse
 import doctest
diff --git a/build/config/mac/symbols.gni b/build/config/mac/symbols.gni
index a510dc3a80f420731e7315f5396b4b3ceb838192..e8b15d6dc16e2ab9db734187f06909447a278d58 100644
--- a/build/config/mac/symbols.gni
+++ b/build/config/mac/symbols.gni
@@ -1,6 +1,4 @@
 # Copyright 2016 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 
 import("$build_root/config/sanitizers/sanitizers.gni")
 
diff --git a/build/config/mac/xcrun.py b/build/config/mac/xcrun.py
index d9e6e47b594c55e305e0aede380dacc8844287d5..a62d7ef695913574a9c91ae89298f1f6e8b2fa3d 100755
--- a/build/config/mac/xcrun.py
+++ b/build/config/mac/xcrun.py
@@ -1,8 +1,6 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # Copyright 2016 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 
 import argparse
 import os
diff --git a/build/misc/mac/check_return_value.py b/build/misc/mac/check_return_value.py
index 33c5bc1ae828312100cc1f2d5ee35e5d8c613941..cd67edb2537de5cc0a5bf3bdf4bed2b11dca1685 100755
--- a/build/misc/mac/check_return_value.py
+++ b/build/misc/mac/check_return_value.py
@@ -1,8 +1,6 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # Copyright 2014 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 
 """This program wraps an arbitrary command and prints "1" if the command ran
 successfully.
diff --git a/build/misc/mac/find_sdk.py b/build/misc/mac/find_sdk.py
index d34d5ae197f876f127ac53ab102c48b048c6c774..254e89b769b9e42f6bc0ef874079dc5adfae26ff 100755
--- a/build/misc/mac/find_sdk.py
+++ b/build/misc/mac/find_sdk.py
@@ -1,8 +1,6 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 
 """Prints the lowest locally available SDK version greater than or equal to a
 given minimum sdk version to standard output. If --developer_dir is passed, then
diff --git a/build/misc/overrides/build.gni b/build/misc/overrides/build.gni
index f7162e9f7dce6467abed27197320c0283ae4f341..3ef33fdc7e34d219ea49c11ce3ce6178f1f276e2 100644
--- a/build/misc/overrides/build.gni
+++ b/build/misc/overrides/build.gni
@@ -1,6 +1,4 @@
 # Copyright 2016 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 
 # Variable that can be used to support multiple build scenarios, like having
 # Chromium specific targets in a client project's GN file etc.
diff --git a/build/toolchain/BUILD.gn b/build/toolchain/BUILD.gn
index 26114b812fe3168dc5767a36290426cab63c82d1..bda51f66c0b84232087f75dde2b6dae733a2c5a8 100644
--- a/build/toolchain/BUILD.gn
+++ b/build/toolchain/BUILD.gn
@@ -1,6 +1,4 @@
 # Copyright 2016 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 
 import("$build_root/toolchain/concurrent_links.gni")
 
diff --git a/build/toolchain/clang_static_analyzer.gni b/build/toolchain/clang_static_analyzer.gni
index 9cb797541c9d671df6987aa821a49747cd2c0165..6af69f0d895ccbea9d8224a10a7ee4f86ff095ac 100644
--- a/build/toolchain/clang_static_analyzer.gni
+++ b/build/toolchain/clang_static_analyzer.gni
@@ -1,6 +1,4 @@
 # Copyright (c) 2017 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 
 # Defines the configuration of Clang static analysis tools.
 # See docs/clang_static_analyzer.md for more information.
diff --git a/build/toolchain/clang_static_analyzer_wrapper.py b/build/toolchain/clang_static_analyzer_wrapper.py
index ae738a857b6cdb973054ec5895f29df19cc3aafc..a096fb3e7e5ab592b224a4a8b28dd1c8b686d45b 100755
--- a/build/toolchain/clang_static_analyzer_wrapper.py
+++ b/build/toolchain/clang_static_analyzer_wrapper.py
@@ -1,8 +1,6 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # Copyright 2017 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 
 """Adds an analysis build step to invocations of the Clang C/C++ compiler.
 
diff --git a/build/toolchain/concurrent_links.gni b/build/toolchain/concurrent_links.gni
index 7ba806c301e4d9f767df251526d4bd93880f88e7..29bf512bb9c45fb2899398561fd5662878a2e28c 100644
--- a/build/toolchain/concurrent_links.gni
+++ b/build/toolchain/concurrent_links.gni
@@ -1,6 +1,4 @@
 # Copyright 2016 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 
 # This file should only be imported from files that define toolchains.
 # There's no way to enforce this exactly, but all toolchains are processed
diff --git a/build/toolchain/gcc_link_wrapper.py b/build/toolchain/gcc_link_wrapper.py
index 096deef411e6238f3c1c29fe214ed5132a8db322..84333b337254310f893db228419c9552c9dff075 100755
--- a/build/toolchain/gcc_link_wrapper.py
+++ b/build/toolchain/gcc_link_wrapper.py
@@ -1,8 +1,6 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # Copyright 2015 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 """Runs a linking command and optionally a strip command.
 
 This script exists to avoid using complex shell commands in
diff --git a/build/toolchain/gcc_solink_wrapper.py b/build/toolchain/gcc_solink_wrapper.py
index 57aba69f6a6e153c96f8fe5817a5508148b403c3..42b5e3923f28c4fac68a99588b6dfca44cccb935 100755
--- a/build/toolchain/gcc_solink_wrapper.py
+++ b/build/toolchain/gcc_solink_wrapper.py
@@ -1,8 +1,6 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # Copyright 2015 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 """Runs 'ld -shared' and generates a .TOC file that's untouched when unchanged.
 
 This script exists to avoid using complex shell commands in
diff --git a/build/toolchain/get_concurrent_links.py b/build/toolchain/get_concurrent_links.py
index 2641f232783bc7f7cc1f90aa679036889f762ffb..b80bc58ea69b134d6a57252b2cb840fba1959896 100755
--- a/build/toolchain/get_concurrent_links.py
+++ b/build/toolchain/get_concurrent_links.py
@@ -1,8 +1,6 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # Copyright 2014 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 
 # This script computes the number of concurrent links we want to run
 # in the build as a function of machine spec. It's based
diff --git a/build/toolchain/get_cpu_count.py b/build/toolchain/get_cpu_count.py
index 4ffb02610f60c54dd9e7ff37e70c1e5f319b3e19..efefcdf041f720d8097aa238d2f0729b4bfd45fa 100755
--- a/build/toolchain/get_cpu_count.py
+++ b/build/toolchain/get_cpu_count.py
@@ -1,8 +1,6 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # Copyright 2018 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 
 # This script shows cpu count to specify capacity of action pool.
 
diff --git a/build/toolchain/mac/BUILD.gn b/build/toolchain/mac/BUILD.gn
index 6e10232893c7337e8adf685b2cadbc304f5d4d68..01204e3bd3f80ef11178b6a32c5af85c72690184 100644
--- a/build/toolchain/mac/BUILD.gn
+++ b/build/toolchain/mac/BUILD.gn
@@ -1,6 +1,4 @@
 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 
 import("$build_root/config/clang/clang.gni")
 import("$build_root/config/mac/mac_sdk.gni")
diff --git a/build/toolchain/mac/filter_libtool.py b/build/toolchain/mac/filter_libtool.py
index 447e42c9ae6fe36fa07eb97214d1b69f52e6222a..20df143c39ab635edad48e6acc906967a57bc54d 100755
--- a/build/toolchain/mac/filter_libtool.py
+++ b/build/toolchain/mac/filter_libtool.py
@@ -1,8 +1,6 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # Copyright 2016 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 
 import os
 import re
diff --git a/build/toolchain/mac/get_tool_mtime.py b/build/toolchain/mac/get_tool_mtime.py
index 6dfe3e7792d8f6fab03169b8fed4bd21c469048a..a73f8ee0b9384300132a82ab40d164f8589109c9 100755
--- a/build/toolchain/mac/get_tool_mtime.py
+++ b/build/toolchain/mac/get_tool_mtime.py
@@ -1,8 +1,6 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # Copyright 2016 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 
 import os
 import sys
diff --git a/build/toolchain/mac/linker_driver.py b/build/toolchain/mac/linker_driver.py
index d0b344e487b39670855c4a440febee7650c4e42e..fba2959cbb262c4994de8cec6a175d3f2c059c3b 100755
--- a/build/toolchain/mac/linker_driver.py
+++ b/build/toolchain/mac/linker_driver.py
@@ -1,8 +1,6 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # Copyright 2016 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
 
 import os
 import os.path