Roll chromium_revision b1d79c3..68cf0b8 (361146:361406)

Change log: https://chromium.googlesource.com/chromium/src/+log/b1d79c3..68cf0b8
Full diff: https://chromium.googlesource.com/chromium/src/+/b1d79c3..68cf0b8

Changed dependencies:
* src/tools/swarming_client: https://chromium.googlesource.com/external/swarming.client.git/+log/05e1787..df99a00
DEPS diff: https://chromium.googlesource.com/chromium/src/+/b1d79c3..68cf0b8/DEPS

No update to Clang.

TBR=
CQ_EXTRA_TRYBOTS=tryserver.webrtc:win_baremetal,mac_baremetal,linux_baremetal

Review URL: https://codereview.webrtc.org/1470343002

Cr-Commit-Position: refs/heads/master@{#10782}
diff --git a/DEPS b/DEPS
index 51fc530..096068d 100644
--- a/DEPS
+++ b/DEPS
@@ -6,7 +6,7 @@
 vars = {
   'extra_gyp_flag': '-Dextra_gyp_flag=0',
   'chromium_git': 'https://chromium.googlesource.com',
-  'chromium_revision': 'b1d79c3bae7353740e891513770e8fccdb19b2f4',
+  'chromium_revision': '68cf0b8360a8ea1dbcd5efb524e7831e1c22bd66',
 }
 
 # NOTE: Prefer revision numbers to tags for svn deps. Use http rather than