Add a force-layout-height-to-zero layout mode to WebViewImpl

This makes it possible for the android_webview to implement
'wrap_content' mode for the view's height without completely ignoring
the viewport meta tag (like it's doing now).

TBR=abarth@chromium.org, aelias@chromium.org, mnaganov@chromium.org
BUG=392460

Review URL: https://codereview.chromium.org/453893002

git-svn-id: svn://svn.chromium.org/blink/trunk@179823 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Mark LayoutTests fast/js/kde/StringObject.html as NeedsRebaseline.

R=machenbach@chromium.org
BUG=401408

Review URL: https://codereview.chromium.org/452813002

git-svn-id: svn://svn.chromium.org/blink/trunk@179824 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Update OilpanExpectations after r179695

fetch-event.html no longer needs an exception.

TBR=haraken,oilpan-reviews
BUG=400645
NOTRY=true

Review URL: https://codereview.chromium.org/454583004

git-svn-id: svn://svn.chromium.org/blink/trunk@179825 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Linkify console stacks with blackboxing consideration.

BUG=267592
R=vsevik, pfeldman

Review URL: https://codereview.chromium.org/448743002

git-svn-id: svn://svn.chromium.org/blink/trunk@179826 bbb929c8-8fbe-4397-9dbb-9b2b20218538