Use SkLayerDrawLooper::Builder to construct SkLayerDrawLooper.

The addLayer() methods of SkLayerDrawLooper will soon be removed. This CL
updates all uses of those methods with the corresponding methods in
SkLayerDrawLooper::Builder.

BUG=skia:2141

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=168041

Review URL: https://codereview.chromium.org/177473003

git-svn-id: svn://svn.chromium.org/blink/trunk@169335 bbb929c8-8fbe-4397-9dbb-9b2b20218538
[DevTools] Get rid of fraction split view size.

One can pass default size as a fraction, but after that
size will be stored in pixels.

BUG=none

Review URL: https://codereview.chromium.org/197253002

git-svn-id: svn://svn.chromium.org/blink/trunk@169336 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Don't show <exception> in Local scope of an async call frame.

We used to show current exception in the Local scope of all frames in the current stack.
Showing exception in the Local scope of an async stack frame is confusing.

R=pfeldman

Review URL: https://codereview.chromium.org/198253006

git-svn-id: svn://svn.chromium.org/blink/trunk@169337 bbb929c8-8fbe-4397-9dbb-9b2b20218538