[chromium] CanvasLayerTextureUpdater needs to convert opaque rects back to content...

[chromium] CanvasLayerTextureUpdater needs to convert opaque rects back to content space.
https://bugs.webkit.org/show_bug.cgi?id=90092

The CanvasLayerTextureUpdater currently receives its opaque rects in
layer space, but is expected to return them in content space and does
not convert them. This patch adds this conversion. To avoid numerical
errors, this patch also switches to using float rects to store opaque
rects where appropriate.

Patch by Ian Vollick <vollick@chromium.org> on 2012-06-30
Reviewed by Adrienne Walker.

Source/Platform:

* chromium/public/WebContentLayerClient.h:
(WebKit):
(WebContentLayerClient):

Source/WebCore:

Unit test: ContentLayerTest.ContentLayerPainterWithDeviceScale

* platform/graphics/chromium/CanvasLayerTextureUpdater.cpp:
(WebCore::CanvasLayerTextureUpdater::paintContents):
* platform/graphics/chromium/ContentLayerChromium.cpp:
(WebCore::ContentLayerPainter::ContentLayerPainter):
(WebCore::ContentLayerPainter::create):
(WebCore::ContentLayerPainter::paint):
* platform/graphics/chromium/ContentLayerChromium.h:
(WebCore):
(ContentLayerDelegate):
(ContentLayerPainter):
* platform/graphics/chromium/LayerPainterChromium.h:
(WebCore):
(LayerPainterChromium):
* platform/graphics/chromium/LinkHighlight.cpp:
(WebCore::LinkHighlight::paintContents):
* platform/graphics/chromium/LinkHighlight.h:
(LinkHighlight):
* platform/graphics/chromium/OpaqueRectTrackingContentLayerDelegate.cpp:
(WebCore::OpaqueRectTrackingContentLayerDelegate::paintContents):
* platform/graphics/chromium/OpaqueRectTrackingContentLayerDelegate.h:
(OpaqueRectTrackingContentLayerDelegate):
* platform/graphics/chromium/ScrollbarLayerChromium.cpp:

Source/WebKit/chromium:

* WebKit.gypi:
* src/WebContentLayerImpl.cpp:
(WebKit::WebContentLayerImpl::paintContents):
* src/WebContentLayerImpl.h:
(WebContentLayerImpl):
* tests/CCLayerTreeHostCommonTest.cpp:
* tests/CCLayerTreeHostTest.cpp:
(WTF::TestOpacityChangeLayerDelegate::paintContents):
(WTF::MockContentLayerDelegate::paintContents):
* tests/ContentLayerChromiumTest.cpp: Added.
(WebKit):
(OpaqueRectDrawingGraphicsContextPainter):
(WebKit::OpaqueRectDrawingGraphicsContextPainter::OpaqueRectDrawingGraphicsContextPainter):
(WebKit::OpaqueRectDrawingGraphicsContextPainter::~OpaqueRectDrawingGraphicsContextPainter):
(MockContentLayerDelegate):
(WebKit::MockContentLayerDelegate::MockContentLayerDelegate):
(WebKit::TEST):
* tests/LayerChromiumTest.cpp:
* tests/OpaqueRectTrackingContentLayerDelegateTest.cpp:
(WebCore::TEST_F):
* tests/TiledLayerChromiumTest.cpp:
* tests/WebLayerTest.cpp:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@121628 268f45cc-cd09-0410-ab3c-d52691b4dbfc