Roll chromium_revision d3db2ff..375f736

Mainly to bring in https://codereview.chromium.org/636083002
updates to opus.

Relevant changes (https://chromium.googlesource.com/chromium/src/+/d3db2ff..375f736/DEPS)
* buildtools: 6bc51af..1ca1f25
* third_party/libsrtp: 98284c8..6446144
* tools/gyp: a61e860..b13d8f2
* tools/swarming_client: bcb3bc3..41036ec

Clang version was not updated in this roll.

BUG=
R=marpan@google.com

Review URL: https://webrtc-codereview.appspot.com/24179004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7631 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/DEPS b/DEPS
index 55e8bd5..22b5f89 100644
--- a/DEPS
+++ b/DEPS
@@ -9,7 +9,7 @@
   # Use this googlecode_url variable only if there is an internal mirror for it.
   # If you do not know, use the full path while defining your new deps entry.
   "googlecode_url": "http://%s.googlecode.com/svn",
-  "chromium_revision": "d3db2ff38e13cd900386404849eeb53ad884bf09",
+  "chromium_revision": "375f7364c3f315c394d3b7accbd7e236b7ea7b04",
 }
 
 # NOTE: Prefer revision numbers to tags for svn deps. Use http rather than