Roll chromium_revision ee31124..508edd3 (378158:379249)

This includes renaming back libvpx_new to libvpx in
https://codereview.chromium.org/1765703002

Add symlink to src/mojo as workaround while figuring out how to fix
this upstream in Chromium. See webrtc:5629.

Change log: ee31124..508edd3
Full diff: ee31124..508edd3

Changed dependencies:
* src/third_party/boringssl/src: https://boringssl.googlesource.com/boringssl.git/+log/6d49157..708db16
* src/third_party/libvpx_new/source/libvpx: https://chromium.googlesource.com/webm/libvpx.git/+log/89cc682..None
* src/tools/swarming_client: https://chromium.googlesource.com/external/swarming.client.git/+log/a72f46e..df6e95e
DEPS diff: https://chromium.googlesource.com/chromium/src/+/ee31124..508edd3/DEPS

No update to Clang.

BUG=webrtc:5629
TBR=marpan@webrtc.org, stefan@webrtc.org,
NOTRY=True

Review URL: https://codereview.webrtc.org/1766643002

Cr-Commit-Position: refs/heads/master@{#11879}

setup_links.py

@@ -34,6 +34,7 @@ import textwrap
 DIRECTORIES = [
   'build',
   'buildtools',
+  'mojo',  # TODO(kjellander): Remove, see webrtc:5629.
   'testing',
   'third_party/binutils',
   'third_party/boringssl',
@@ -48,7 +49,7 @@ DIRECTORIES = [
   'third_party/libjpeg_turbo',
   'third_party/libsrtp',
   'third_party/libudev',
-  'third_party/libvpx_new',
+  'third_party/libvpx',
   'third_party/libyuv',
   'third_party/llvm-build',
   'third_party/lss',