Roll chromium_revision 7fa6701bc5..1a73d11e65 (398458:399420)

A fix was needed to make Android tests pass after
https://codereview.chromium.org/2043803003

Another fix was needed for the webrtc_perf_tests.isolate sinc eit was missing
one file.

Change log: https://chromium.googlesource.com/chromium/src/+log/7fa6701bc5..1a73d11e65
Full diff: https://chromium.googlesource.com/chromium/src/+/7fa6701bc5..1a73d11e65

Changed dependencies:
* src/buildtools: https://chromium.googlesource.com/chromium/buildtools.git/+log/8dd3c8e39a..099f1da55b
* src/third_party/boringssl/src: https://boringssl.googlesource.com/boringssl.git/+log/0fc7df55c0..171b5403ee
* src/third_party/ffmpeg: https://chromium.googlesource.com/chromium/third_party/ffmpeg.git/+log/7f03319b9d..bcb8b67b8b
DEPS diff: https://chromium.googlesource.com/chromium/src/+/7fa6701bc5..1a73d11e65/DEPS

No update to Clang.

TBR=
BUG=webrtc:5990
NOTRY=True

Review-Url: https://codereview.webrtc.org/2074043002
Cr-Commit-Position: refs/heads/master@{#13178}
diff --git a/webrtc/test/testsupport/fileutils.cc b/webrtc/test/testsupport/fileutils.cc
index d99b990..4bf8c5f 100644
--- a/webrtc/test/testsupport/fileutils.cc
+++ b/webrtc/test/testsupport/fileutils.cc
@@ -57,7 +57,7 @@
 #endif
 
 #ifdef WEBRTC_ANDROID
-const char* kRootDirName = "/sdcard/";
+const char* kRootDirName = "/sdcard/chromium_tests_root/";
 #else
 // The file we're looking for to identify the project root dir.
 const char* kProjectRootFileName = "DEPS";