DevTools: Fix removing native context menu listeners.

R=pfeldman
NOTRY=true

Review URL: https://codereview.chromium.org/383723002

git-svn-id: svn://svn.chromium.org/blink/trunk@177819 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: rename WebInspector.(console -> consoleModel, messageSink -> console).

Review URL: https://codereview.chromium.org/378293003

git-svn-id: svn://svn.chromium.org/blink/trunk@177820 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Add support for showing shortcuts based on shortcuts registry and use it for pause/resume shortcut.

Review URL: https://codereview.chromium.org/377253002

git-svn-id: svn://svn.chromium.org/blink/trunk@177821 bbb929c8-8fbe-4397-9dbb-9b2b20218538
[ServiceWorker] LayoutTest for event.request.referrer.

This change depends on http://crrev.com/329853012 and http://crrev.com/373713003

BUG=373120

Review URL: https://codereview.chromium.org/373713004

git-svn-id: svn://svn.chromium.org/blink/trunk@177822 bbb929c8-8fbe-4397-9dbb-9b2b20218538