Merge 104501 - [chromium win] Creating lots of temporary canvas contexts will crash.

Merge 104501 - [chromium win] Creating lots of temporary canvas contexts will crash.
https://bugs.webkit.org/show_bug.cgi?id=68420

When using the skia port, the allocation of 2d canvas backing stores
no longer needs to be done through a platform API (GDI/CG) because
canvases now use skia for drawing text.  Removing the allocation through
GDI on windows prevents resource exhaustion due to unreferenced canvases
that are awaiting garbage collection.

Patch by Justin Novosad <junov@chromium.org>; on 2012-01-09
Reviewed by Stephen White.

No new tests: Relying on existing canvas layout tests.

* html/HTMLCanvasElement.cpp:
(WebCore::HTMLCanvasElement::createImageBuffer):
* platform/graphics/ImageBuffer.h:
* platform/graphics/skia/ImageBufferSkia.cpp:
(WebCore::createNonPlatformCanvas):
(WebCore::ImageBuffer::ImageBuffer):

TBR=commit-queue@webkit.org
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=106845

[Justin Novosad, 2012-02-06 21:56:17]

On 2012/02/06 21:43:18, Stephen White wrote:

lgtm