DEPS: Sync Git subtree mirrors instead of symlinking into chromium/src

.gitignore

Index: .gitignore
diff --git a/.gitignore b/.gitignore
index e0918702021f51a0f185d9e184e5e0afba8acf75..45864c6c86ee23da5f6a496d5a627f22282e9496 100644
--- a/.gitignore
+++ b/.gitignore
@@ -40,120 +40,18 @@
 /base
 /build
 /buildtools
-/chromium/.gclient.tmp
-/chromium/.gclient.tmp_entries
-/chromium/.last_sync_chromium
-/chromium/_bad_scm
-/chromium/src
 /links
 /links.db
 /mojo
 /out
 /testing
-/third_party/BUILD.gn
-/third_party/WebKit
-/third_party/WebKit/Tools/Scripts
-/third_party/accessibility_test_framework
-/third_party/afl
-/third_party/android_platform
-/third_party/android_support_test_runner
-/third_party/android_tools
-/third_party/apache_velocity
-/third_party/appurify-python
-/third_party/asan
-/third_party/ashmem
-/third_party/binutils
-/third_party/boringssl
-/third_party/bouncycastle
-/third_party/byte_buddy
-/third_party/catapult
-/third_party/ced
-/third_party/clang_format
-/third_party/class-dump
-/third_party/closure_compiler
-/third_party/colorama
-/third_party/cygwin
-/third_party/directxsdk
-/third_party/espresso
-/third_party/expat
-/third_party/ffmpeg
-/third_party/gaeunit
-/third_party/gflags
-/third_party/google-visualization-python
-/third_party/gtest-parallel
-/third_party/guava
-/third_party/hamcrest
-/third_party/icu
-/third_party/icu4j
-/third_party/ijar
-/third_party/instrumented_libraries
-/third_party/intellij
-/third_party/jsoncpp
-/third_party/javax_inject
-/third_party/jsr-305
-/third_party/junit
-/third_party/libFuzzer
-/third_party/libc++
-/third_party/libc++-static
-/third_party/libc++abi
-/third_party/libjingle
-/third_party/libjpeg
-/third_party/libjpeg_turbo
-/third_party/libsrtp
-/third_party/libvpx
-/third_party/libxml
-/third_party/libyuv
-/third_party/llvm
-/third_party/lss
-/third_party/mockito
-/third_party/modp_b64
-/third_party/oauth2
-/third_party/objenesis
-/third_party/ocmock
-/third_party/openh264
-/third_party/openmax_dl
-/third_party/opus
-/third_party/ow2_asm
-/third_party/proguard
-/third_party/protobuf
-/third_party/requests
-/third_party/robolectric
-/third_party/sqlite
-/third_party/sqlite4java
-/third_party/syzygy
-/third_party/tcmalloc
-/third_party/usrsctp
-/third_party/valgrind
-/third_party/winsdk_samples
-/third_party/yasm
-/third_party/zlib
-/tools/android
-/tools/clang
-/tools/clang_format_merge_driver
-/tools/determinism
-/tools/generate_library_loader
-/tools/generate_stubs
-/tools/gn
-/tools/grit
-/tools/gyp
-/tools/isolate_driver.py
-/tools/luci-go
-/tools/memory
-/tools/protoc_wrapper
-/tools/python
-/tools/sanitizer_options
-/tools/swarming_client
-/tools/telemetry
-/tools/tsan_suppressions
-/tools/valgrind
+/third_party
+/tools
 /tools-webrtc/video_quality_toolchain/linux/ffmpeg
 /tools-webrtc/video_quality_toolchain/linux/zxing
 /tools-webrtc/video_quality_toolchain/mac/ffmpeg
 /tools-webrtc/video_quality_toolchain/mac/zxing
 /tools-webrtc/video_quality_toolchain/win/*.dll
 /tools-webrtc/video_quality_toolchain/win/*.exe
-/tools/vim
-/tools/win
-/tools/whitespace.txt
 /x86-generic_out/
 /xcodebuild