Roll chromium_revision ac76448402..a1744a2324 (482173:482179)

Change log: https://chromium.googlesource.com/chromium/src/+log/ac76448402..a1744a2324
Full diff: https://chromium.googlesource.com/chromium/src/+/ac76448402..a1744a2324

Changed dependencies:
* src/third_party: https://chromium.googlesource.com/chromium/src/third_party/+log/858ff5c37b..ef94e24bec
DEPS diff: https://chromium.googlesource.com/chromium/src/+/ac76448402..a1744a2324/DEPS

No update to Clang.

TBR=
BUG=None

Review-Url: https://codereview.webrtc.org/2954263002
Cr-Commit-Position: refs/heads/master@{#18749}
diff --git a/DEPS b/DEPS
index 1409936..af74822 100644
--- a/DEPS
+++ b/DEPS
@@ -2,7 +2,7 @@
 
 vars = {
   'chromium_git': 'https://chromium.googlesource.com',
-  'chromium_revision': 'ac76448402d65a2f5dc9ccea07916f009960e0b0',
+  'chromium_revision': 'a1744a232492c4cc012fc2c6c0b11b7a0ed0b8cf',
   'boringssl_git': 'https://boringssl.googlesource.com',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling swarming_client
@@ -41,7 +41,7 @@
   'src/testing':
     Var('chromium_git') + '/chromium/src/testing' + '@' + '20239e4f974820a52195cc7caf5a36c1e055cc3a',
   'src/third_party':
-    Var('chromium_git') + '/chromium/src/third_party' + '@' + '858ff5c37be57862e7b5c43504d9a59fa649c4e1',
+    Var('chromium_git') + '/chromium/src/third_party' + '@' + 'ef94e24bec778ddb713b8a428ed2b2bd17666210',
   'src/third_party/boringssl/src':
    Var('boringssl_git') + '/boringssl.git' + '@' +  Var('boringssl_revision'),
   'src/third_party/catapult':