Rebaseline layout tests after squashing is enabled.

The tests mentioned in this patch need to be rebaselined when squashing
is enabled because their text output is affected by changes in the
GraphicsLayer tree topology.

BUG=261605

Review URL: https://codereview.chromium.org/238293011

git-svn-id: svn://svn.chromium.org/blink/trunk@171946 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Adding scroll rects showing in the details view of Layers panel.

Review URL: https://codereview.chromium.org/242843002

Review URL: https://codereview.chromium.org/242843002

git-svn-id: svn://svn.chromium.org/blink/trunk@171947 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Update Blink to use new Skia Picture recording API (take 2)

The Skia SkPicture recording API is changing to make it clearer when the SkPicture is valid. In the new API SkPictureRecorder::endRecording returns the new SkPicture. 

I missed these on the first pass.

Review URL: https://codereview.chromium.org/241503002

git-svn-id: svn://svn.chromium.org/blink/trunk@171948 bbb929c8-8fbe-4397-9dbb-9b2b20218538