Reland 204442 "Split Layer::SetScrollOffset to tw..."

Test in question was disabled and will be updated.

> Revert 204442 "Split Layer::SetScrollOffset to two functions for..."
> 
> webkit_unit_tests gets broken after 20442.
> Logs:
>  http://build.chromium.org/p/chromium.linux/builders/Android%20Tests%20%28dbg%29/builds/11442
>  http://build.chromium.org/p/chromium.linux/builders/Android%20Tests/builds/4910
> 
> > Split Layer::SetScrollOffset to two functions for different use
> > 
> > Currently there are two callers to Layer::SetScrollOffset. One is from
> > the Blink ScrollingCoordinator to setup scrolling parameters. The other
> > one is from the threaded compositing commits to apply scroll deltas.
> > 
> > After the patch we have Layer::SetScrollOffset for Blink. This version
> > will setNeedsCommit(), but will not notify ScrollableArea (who initiated
> > the scroll anyway) for the change. And a new function
> > Layer::SetScrollOffsetFromImplSide for commits. This version will notify
> > ScrollableArea about the change, but won't setNeedsCommit() for no reason.
> > 
> > This fixes a use-after-free bug in Layer::SetScrollOffset, due to
> > ScrollableArea destroying the layer during the process then the layer
> > attempts to setNeedsCommit().
> > 
> > R=jamesr@chromium.org
> > BUG=245713,245987
> > NOTRY=true
> > TEST=cc_unittests:LayerTreeHostScrollTestLayerStructureChange.*
> > 
> > Review URL: https://chromiumcodereview.appspot.com/15984005
> 
> TBR=trchen@chromium.org
> 
> Review URL: https://codereview.chromium.org/16460005

TBR=hashimoto@chromium.org

Review URL: https://codereview.chromium.org/16295032

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@204546 0039d316-1c4b-4281-b951-d872f2087c98

0 files changed, 0 insertions, 0 deletions