Remove --enable-accelerated-filters flag, Blink-side.

Source/platform/blink_platform.gypi

 {
   'variables': {
     'platform_files': [
       'AsyncFileSystemCallbacks.h',
       'CalculationValue.cpp',
       'CalculationValue.h',
       'CheckedInt.h',
       'Clock.cpp',
       'Clock.h',
       'ColorChooser.cpp',
@@ skipping 504 matching lines @@
       'graphics/filters/ReferenceFilter.cpp',
       'graphics/filters/ReferenceFilter.h',
       'graphics/filters/SkiaImageFilterBuilder.cpp',
       'graphics/filters/SkiaImageFilterBuilder.h',
       'graphics/filters/SourceAlpha.cpp',
       'graphics/filters/SourceAlpha.h',
       'graphics/filters/SourceGraphic.cpp',
       'graphics/filters/SourceGraphic.h',
       'graphics/filters/SpotLightSource.cpp',
       'graphics/filters/SpotLightSource.h',
-      'graphics/gpu/AcceleratedImageBufferSurface.cpp',
-      'graphics/gpu/AcceleratedImageBufferSurface.h',
       'graphics/gpu/DrawingBuffer.cpp',
       'graphics/gpu/DrawingBuffer.h',
       'graphics/gpu/Extensions3DUtil.cpp',
       'graphics/gpu/Extensions3DUtil.h',
       'graphics/gpu/WebGLImageBufferSurface.cpp',
       'graphics/gpu/WebGLImageBufferSurface.h',
       'graphics/gpu/WebGLImageConversion.cpp',
       'graphics/gpu/WebGLImageConversion.h',
       'graphics/media/MediaPlayer.cpp',
       'graphics/media/MediaPlayer.h',
@@ skipping 384 matching lines @@
       'graphics/ImageDecodingStoreTest.cpp',
       'graphics/ImageFrameGeneratorTest.cpp',
       'graphics/gpu/DrawingBufferTest.cpp',
       'graphics/test/MockImageDecoder.h',
       'graphics/test/MockWebGraphicsContext3D.h',
       'image-decoders/gif/GIFImageDecoderTest.cpp',
       'image-decoders/jpeg/JPEGImageDecoderTest.cpp',
     ],
   },
 }