Roll chromium_revision 2a03e86fcf..bc1c2103ef (389507:390316)

The BoringSSL changes in
https://codereview.chromium.org/1917223004/
https://codereview.chromium.org/1919383002/
required moving the build_with_chromium variable to build.gni.

Change log: 2a03e86fcf..bc1c2103ef
Full diff: 2a03e86fcf..bc1c2103ef

Changed dependencies:
* src/buildtools: e84114dbe2..cdbd50759b
* src/third_party/boringssl/src: https://boringssl.googlesource.com/boringssl.git/+log/f01fb5dc0e..a081423809
* src/tools/gyp: 6ea68631cd..4cf07e8d61
DEPS diff: 2a03e86fcf..bc1c2103ef/DEPS

Clang version changed 266460:267383
Details: 2a03e86fcf..bc1c2103ef/tools/clang/scripts/update.py

TBR=pbos@webrtc.org
NOTRY=True

Review-Url: https://codereview.webrtc.org/1925843003
Cr-Commit-Position: refs/heads/master@{#12544}

DEPS

@@ -6,7 +6,7 @@
 vars = {
   'extra_gyp_flag': '-Dextra_gyp_flag=0',
   'chromium_git': 'https://chromium.googlesource.com',
-  'chromium_revision': '2a03e86fcfb6f831ef8658cbd360f54bb5ace62e',
+  'chromium_revision': 'bc1c2103ef7da6c61df91d2ee7dc1b00098a2b57',
 }
 
 # NOTE: Use http rather than https; the latter can cause problems for users

build_overrides/build.gni

@@ -12,3 +12,7 @@
 # remove this when Chromium drops 10.6 support and also requires 10.7.
 mac_sdk_min_build_override = "10.11"
 mac_deployment_target_build_override = "10.7"
+
+# Variable that can be used to support multiple build scenarios, like having
+# Chromium specific targets in a client project's GN file etc.
+build_with_chromium = false

build_overrides/webrtc.gni

@@ -12,7 +12,9 @@
 # Every variable here needs to be present in the corresponding file in
 # build_overrides/ of Chromium.
 
-build_with_chromium = false
+# The build_with_chromium variable is now located in build.gni (now also used
+# by BoringSSL).
+import("//build_overrides/build.gni")
 
 # Excluded in Chromium since its prerequisites don't require Pulse Audio.
 rtc_include_pulse_audio = true