Roll src/third_party/WebKit 630e64c:edc06e1 (svn 187562:187564)

Summary of changes available at:
https://chromium.googlesource.com/chromium/blink/+log/630e64c..edc06e1

TBR=jbroman@chromium.org,haraken@chromium.org

Review URL: https://codereview.chromium.org/794493005

Cr-Commit-Position: refs/heads/master@{#309314}

DEPS

@@ -36,7 +36,7 @@ vars = {
   'libcxx_revision': '48198f9110397fff47fe7c37cbfa296be7d44d3d',
   'libcxxabi_revision': '4ad1009ab3a59fa7a6896d74d5e4de5885697f95',
   'webkit_trunk': 'http://src.chromium.org/blink/trunk',
-  'webkit_revision': '630e64cf318eddbb523b1e2636b778dbb4da1906', # from svn revision 187562
+  'webkit_revision': 'edc06e11ecbe91f5259e5f167692a3a21fbb0002', # from svn revision 187564
   'chromium_git': 'https://chromium.googlesource.com',
   'chromiumos_git': 'https://chromium.googlesource.com/chromiumos',
   'pdfium_git': 'https://pdfium.googlesource.com',