Merge 97451 - Clear WebMediaPlayerClientImpl back pointer on destruction

Merge 97451 - Clear WebMediaPlayerClientImpl back pointer on destruction
https://bugs.webkit.org/show_bug.cgi?id=69973

Reviewed by James Robinson.

Clear the backpointer and remove the unused m_currentFrame

Source/WebCore:

* platform/graphics/chromium/VideoLayerChromium.cpp:
(WebCore::VideoLayerChromium::VideoLayerChromium):
(WebCore::VideoLayerChromium::cleanupResources):
(WebCore::VideoLayerChromium::updateCompositorResources):
(WebCore::VideoLayerChromium::releaseProvider):
* platform/graphics/chromium/VideoLayerChromium.h:

Source/WebKit/chromium:

* src/WebMediaPlayerClientImpl.cpp:
(WebKit::WebMediaPlayerClientImpl::~WebMediaPlayerClientImpl):
(WebKit::WebMediaPlayerClientImpl::load):
(WebKit::WebMediaPlayerClientImpl::getCurrentFrame):
(WebKit::WebMediaPlayerClientImpl::putCurrentFrame):
* src/WebMediaPlayerClientImpl.h:


TBR=jschuh@chromium.org
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=97679