This is a reland of https://codereview.webrtc.org/2348133003/ which was reverted. This CL adds a copy of Chromium's build/filename_rules.gypi into webrtc/build and includes it in webrtc/build/common.gypi. This was needed since the file was dropped in crrev.com/8c0eb8ed76 The revision of filename_rules.gypi being added is:5b20e75e68/build/filename_rules.gypiChange log:cf9457edb7..cede888c27Full diff:cf9457edb7..cede888c27Changed dependencies: * src/buildtools:adb8bf4e8f..6115afa0ea* src/third_party/boringssl/src: https://boringssl.googlesource.com/boringssl.git/+log/bc61769e49..ed6c5d3910 * src/third_party/ffmpeg:35740fc7b7..3c7a098821* src/third_party/libFuzzer/src:96e97b48e8..eb9b8b0366* src/third_party/libvpx/source/libvpx:e66cd132f0..4282d29355DEPS diff:cf9457edb7..cede888c27/DEPS Clang version changed 280106:280836 Details:cf9457edb7..cede888c27/tools/clang/scripts/update.py NOTRY=True TBR=marpan@webrtc.org, BUG=None Review-Url: https://codereview.webrtc.org/2351163002 Cr-Commit-Position: refs/heads/master@{#14310}