DevTools: Do not remove padding rows in heap snapshot viewport.

R=yurys@chromium.org

Review URL: https://codereview.chromium.org/182063006

git-svn-id: svn://svn.chromium.org/blink/trunk@168023 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Add Cache interface for ServiceWorker behind a flag

This introduces Cache interface that will provide programmable application
cache mechanism on ServiceWorker.


BUG=345640
TEST=compile (tests will be added after ServiceWorkerGlobalScope gets available in LayoutTests)

Review URL: https://codereview.chromium.org/176833003

git-svn-id: svn://svn.chromium.org/blink/trunk@168024 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Enable antialiasing in the pie chart.

Review URL: https://codereview.chromium.org/179853002

git-svn-id: svn://svn.chromium.org/blink/trunk@168025 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Turn window.postMessage into an ActiveDOMObject

When JavaScript execution is paused by the debugger messages sent via postMessage should be suspended similar to other events.

BUG=224874

Review URL: https://codereview.chromium.org/157243003

git-svn-id: svn://svn.chromium.org/blink/trunk@168026 bbb929c8-8fbe-4397-9dbb-9b2b20218538