[chromium] Enable tracking opaque region in Skia graphics context, return it from...

[chromium] Enable tracking opaque region in Skia graphics context, return it from LayerTextureUpdater
https://bugs.webkit.org/show_bug.cgi?id=76211

Patch by Dana Jansens <danakj@chromium.org> on 2012-01-18
Reviewed by James Robinson.

Source/WebCore:

New unit tests in LayerTextureUpdaterTest.cpp

* platform/graphics/chromium/BitmapCanvasLayerTextureUpdater.cpp:
(WebCore::BitmapCanvasLayerTextureUpdater::prepareToUpdate):
* platform/graphics/chromium/BitmapCanvasLayerTextureUpdater.h:
* platform/graphics/chromium/BitmapSkPictureCanvasLayerTextureUpdater.cpp:
(WebCore::BitmapSkPictureCanvasLayerTextureUpdater::prepareToUpdate):
* platform/graphics/chromium/BitmapSkPictureCanvasLayerTextureUpdater.h:
* platform/graphics/chromium/ContentLayerChromium.cpp:
(WebCore::ContentLayerChromium::createTextureUpdater):
* platform/graphics/chromium/LayerTextureUpdater.h:
(WebCore::LayerTextureUpdater::prepareToUpdate):
* platform/graphics/chromium/PlatformCanvas.h:
(WebCore::PlatformCanvas::Painter::skiaContext):
* platform/graphics/chromium/SkPictureCanvasLayerTextureUpdater.cpp:
(WebCore::SkPictureCanvasLayerTextureUpdater::SkPictureCanvasLayerTextureUpdater):
(WebCore::SkPictureCanvasLayerTextureUpdater::prepareToUpdate):
(WebCore::SkPictureCanvasLayerTextureUpdater::setOpaque):
* platform/graphics/chromium/SkPictureCanvasLayerTextureUpdater.h:
* platform/graphics/chromium/TiledLayerChromium.cpp:
(WebCore::TiledLayerChromium::prepareToUpdateTiles):

Source/WebKit/chromium:

* WebKit.gypi:
* tests/LayerTextureUpdaterTest.cpp: Added.
(WebCore::TestLayerPainterChromium::TestLayerPainterChromium):
(WebCore::TestLayerPainterChromium::paint):
(WebCore::PaintFillOpaque::operator()):
(WebCore::PaintFillAlpha::operator()):
(WebCore::TEST):
* tests/TiledLayerChromiumTest.cpp:
(WTF::FakeLayerTextureUpdater::prepareToUpdate):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@105314 268f45cc-cd09-0410-ab3c-d52691b4dbfc