Timeline: synchronously enable tracing in inspected renderer upon starting Timeline

Timeline may be started from the inspected page, so we need to enable tracing synchronously
to capture whatever happens immediately after timeline is started.

BUG=361045

Review URL: https://codereview.chromium.org/246333004

git-svn-id: svn://svn.chromium.org/blink/trunk@172358 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Fix support for ConvertableToTraceFormat in case there are two event arguments.

BUG=361045

Review URL: https://codereview.chromium.org/246163004

git-svn-id: svn://svn.chromium.org/blink/trunk@172359 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Remove unused protocol version access methods from Blink

TBR=pfeldman
BUG=None

Review URL: https://codereview.chromium.org/248843003

git-svn-id: svn://svn.chromium.org/blink/trunk@172360 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Auto-rebaseline for r172344

http://src.chromium.org/viewvc/blink?view=revision&revision=172344

BUG=361729
TBR=dominicc@chromium.org

Review URL: https://codereview.chromium.org/246603009

git-svn-id: svn://svn.chromium.org/blink/trunk@172361 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: [CodeMirror] fix context menu for text editor

At present it is impossible to do a right-click for selected text in
text editor: every time one tries to do this - selections gets disabled.

This patch fixes this behavior by catching contextmenu event in a way
coordinated with codemirror text editor.

Review URL: https://codereview.chromium.org/247013004

git-svn-id: svn://svn.chromium.org/blink/trunk@172362 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Get rid of offscreen remainings.

BUG=316092

Review URL: https://codereview.chromium.org/248883003

git-svn-id: svn://svn.chromium.org/blink/trunk@172363 bbb929c8-8fbe-4397-9dbb-9b2b20218538