Roll src/third_party/WebKit 9299220:6505e22 (svn 195347:195349)

Summary of changes available at:
https://chromium.googlesource.com/chromium/blink/+log/9299220..6505e22

TBR=jsbell@chromium.org

Review URL: https://codereview.chromium.org/1132453004

Cr-Commit-Position: refs/heads/master@{#329855}

DEPS

@@ -34,7 +34,7 @@ vars = {
   'llvm_url': 'http://src.chromium.org/llvm-project',
   'llvm_git': 'https://llvm.googlesource.com',
   'webkit_trunk': 'http://src.chromium.org/blink/trunk',
-  'webkit_revision': '92992204fce4fbf269f8fe61995f5b0a7b397645', # from svn revision 195347
+  'webkit_revision': '6505e2216560fddbff0e9f95ce796ad3eb705cba', # from svn revision 195349
   'chromium_git': 'https://chromium.googlesource.com',
   'chromiumos_git': 'https://chromium.googlesource.com/chromiumos',
   'pdfium_git': 'https://pdfium.googlesource.com',