Surface dataLossMessage to script

BUG=311874

Review URL: https://codereview.chromium.org/48413007

git-svn-id: svn://svn.chromium.org/blink/trunk@161138 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Delivery code for candidatewindow events

This is Blink-side code for delivering candidatewindow{show,update,hide}
events from browser to renderer.

The event implementation was committed at r159783.
https://src.chromium.org/viewvc/blink?view=revision&revision=159783

BUG=238585
TEST=not breaking existing tests

Review URL: https://codereview.chromium.org/51633004

git-svn-id: svn://svn.chromium.org/blink/trunk@161139 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Revert "RenderTableCol should inherit from RenderObject instead of RenderBox" and "Auto-rebaseline for r161123"

This reverts commits r161133 and r161123.

r161123 made fast/events/tabindex-focus-blur-all.html crash in debug mode on all platforms: http://test-results.appspot.com/dashboards/flakiness_dashboard.html#group=%40ToT%20Blink&showExpectations=true&tests=fast%2Fevents%2Ftabindex-focus-blur-all.html

BUG=None
TBR=antonm@chromium.org

Review URL: https://codereview.chromium.org/53583006

git-svn-id: svn://svn.chromium.org/blink/trunk@161140 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Rename HitTestRequest::DisallowShadowContent, which is confusing and often misused, to a more dangerous name.

HitTestRequest::DisallowShadowContent is confusing since every hittest doesn't honor this parameter.
Some hittests return a node in shadow trees even HitTestRequest::DisallowShadowContent is specifed.

To prevent this confusing and discouraged parameter from being used further, rename it to a more dangerous name.
Instead of this, callers should call HitTestResult::setToNodesInDocumentTreeScope() explicitly after a hittest if the caller really doesn't want a node in shadow trees.

BUG=313101
TEST=None; No behaviour change;

Review URL: https://codereview.chromium.org/51883013

git-svn-id: svn://svn.chromium.org/blink/trunk@161141 bbb929c8-8fbe-4397-9dbb-9b2b20218538