[ca] Tell CA to clean up unused resources if a given WebProcess won't be drawing
https://bugs.webkit.org/show_bug.cgi?id=107539
<rdar://problem/13032692>

Reviewed by Simon Fraser.

* WebProcess/WebCoreSupport/mac/WebSystemInterface.mm:
(InitWebCoreSystemInterface): Update WebCoreSystemInterface.
* WebProcess/WebPage/WebPage.cpp:
(WebKit::WebPage::WebPage): Initially move the Page out of the window if necessary;
Page defaults to in-window, which is wrong in many cases - we depend on
Page::isInWindow being accurate to decide whether WebPage::setIsInWindow is actually
a state change or not.
(WebKit::WebPage::setIsInWindow):
* WebProcess/WebProcess.cpp: Inform WebProcess when we go on/off screen.
(WebKit::WebProcess::WebProcess):
(WebKit::WebProcess::pageDidMoveOnscreen): Keep track of the number of on-screen pages in this process.
(WebKit::WebProcess::pageWillMoveOffscreen): If the number of on-screen pages drops to zero,  clean up unused rendering resources.
* WebProcess/WebProcess.h:

Update WebSystemInterface.

* WebCoreSupport/WebSystemInterface.mm:
(InitWebCoreSystemInterface):

* platform/mac/WebCoreSystemInterface.h:
* platform/mac/WebCoreSystemInterface.mm:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@146956 268f45cc-cd09-0410-ab3c-d52691b4dbfc
[chromium] Remove the WebVideoFrame, WebVideoFrameProvider, WebStreamTextureClient, and WebVideoLayer classes.
https://bugs.webkit.org/show_bug.cgi?id=112483

Reviewed by James Robinson.

Source/Platform:

These classes are no longer used, so remove them. And remove APIs
to provide them.

* Platform.gypi:
* chromium/public/WebCompositorSupport.h:
(WebKit):
* chromium/public/WebVideoFrame.h: Removed.
* chromium/public/WebVideoFrameProvider.h: Removed.
* chromium/public/WebVideoLayer.h: Removed.

Source/WebKit/chromium:

These classes are no longer used, so remove them.

* WebKit.gyp:
* public/WebMediaPlayer.h:
(WebKit):
(WebMediaPlayer):
* public/WebStreamTextureClient.h: Removed.
* public/WebVideoFrame.h: Removed.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@146957 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Greening the mac bots.
https://bugs.webkit.org/show_bug.cgi?id=113361.

Not Reviewed.

* platform/mac/TestExpectations:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@146958 268f45cc-cd09-0410-ab3c-d52691b4dbfc