Revert 102385 - Use Skia's implementation of Gaussian blur when accelerated filters

Revert 102385 - Use Skia's implementation of Gaussian blur when accelerated filters
are enabled.
https://bugs.webkit.org/show_bug.cgi?id=73949

Reviewed by Zoltan Herczeg.

In the future, this will be covered by the SVG tests run in GPU mode.

* WebCore.gypi:
Add FEGaussianBlurSkia.cpp to the build.
* platform/graphics/filters/FEGaussianBlur.cpp:
(WebCore::FEGaussianBlur::platformApplySoftware):
Call out to platformApplySkia() when USE_SKIA is enabled.
* platform/graphics/filters/FEGaussianBlur.h:
platformApplySkia() declaration.
* platform/graphics/filters/skia: Added.
* platform/graphics/filters/skia/FEGaussianBlurSkia.cpp: Added.
(WebCore::FEGaussianBlur::platformApplySkia):
On the Skia port, use SkBlurImageFilter for drawing
Gaussian blurs in accelerated mode.
* platform/graphics/skia/ImageBufferSkia.cpp:
(WebCore::ImageBuffer::copyImage):
Implement ImageBuffer::copyImage() with DontCopyBackingStore semantics.


TBR=senorblanco@chromium.org
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=111763

[senorblanco, 2012-03-22 21:15:18]

lgtm