HTMLMediaElement::webMediaPlayer() should never be null if m_readyState >= HAVE_METADATA (multiple source)

BUG=382721

Review URL: https://codereview.chromium.org/349973006

git-svn-id: svn://svn.chromium.org/blink/trunk@177353 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Fix layout test crashing on Mac OS X 10.8+ after r177068

Layout tests seem to crash after r177068
-[NSPopUpButtonCell _web_drawFocusRingWithFrame:inView:]: unrecognized selector sent to instance

Also removing TCMInterposing and ScrollAnimatorChromiumMacExt from Objective-C Rename whitelist because they don't seem to exist anymore.

BUG=328814

Review URL: https://codereview.chromium.org/343893003

git-svn-id: svn://svn.chromium.org/blink/trunk@177354 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Auto-rebaseline for r177348

http://src.chromium.org/viewvc/blink?view=revision&revision=177348

BUG=390069
TBR=noel@chromium.org

Review URL: https://codereview.chromium.org/362223002

git-svn-id: svn://svn.chromium.org/blink/trunk@177355 bbb929c8-8fbe-4397-9dbb-9b2b20218538