Roll chromium_revision bd49b12..6311617 (320783:321517)

Relevant changes:
* src/buildtools: d4dd4f7..3b302fe
* src/third_party/android_tools: 98a4345..8b18ef7
* src/third_party/boringssl/src: bf0df92..642f149
* src/third_party/icu: eda9e75..d319ad9
* src/third_party/libvpx: f80cf58..00cf1b1
Details: https://chromium.googlesource.com/chromium/src/+/bd49b12..6311617/DEPS

Clang version was not updated in this roll.

R=pbos@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/47709004

Cr-Commit-Position: refs/heads/master@{#8805}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8805 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/DEPS b/DEPS
index b94bab9..164b16c 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': 'bd49b1236260db8fc008beb1630583bc7623141e',
+  'chromium_revision': '6311617bfa370448f8753ddeaee6a5b13388f909',
 }
 
 # NOTE: Prefer revision numbers to tags for svn deps. Use http rather than