[WIP] Supporting arm_neon_optional flag for blink platform.

Source/platform/blink_platform.gypi

 {
   'includes': [
     'platform_generated.gypi',
   ],
   'variables': {
     'platform_files': [
       'AsyncFileSystemCallbacks.h',
       'CalculationValue.h',
       'CheckedInt.h',
       'Clock.cpp',
@@ skipping 221 matching lines @@
       'audio/ReverbInputBuffer.h',
       'audio/SincResampler.cpp',
       'audio/SincResampler.h',
       'audio/UpSampler.cpp',
       'audio/UpSampler.h',
       'audio/VectorMath.cpp',
       'audio/VectorMath.h',
       'audio/ZeroPole.cpp',
       'audio/ZeroPole.h',
       'audio/android/FFTFrameOpenMAXDLAndroid.cpp',
+      'audio/cpu/arm/VectorMathNEON.h',
       'audio/ffmpeg/FFTFrameFFMPEG.cpp',
       'audio/ipp/FFTFrameIPP.cpp',
       'audio/mac/FFTFrameMac.cpp',
       'blob/BlobData.cpp',
       'blob/BlobData.h',
       'blob/BlobRegistry.cpp',
       'blob/BlobRegistry.h',
       'blob/BlobURL.cpp',
       'blob/BlobURL.h',
       'clipboard/ClipboardMimeTypes.cpp',
@@ skipping 210 matching lines @@
       'geometry/cg/FloatSizeCG.cpp',
       'geometry/cg/IntPointCG.cpp',
       'geometry/cg/IntRectCG.cpp',
       'geometry/cg/IntSizeCG.cpp',
       'geometry/mac/FloatPointMac.mm',
       'geometry/mac/FloatRectMac.mm',
       'geometry/mac/FloatSizeMac.mm',
       'geometry/mac/IntPointMac.mm',
       'geometry/mac/IntRectMac.mm',
       'geometry/mac/IntSizeMac.mm',
-      'graphics/cpu/arm/WebGLImageConversionNEON.h',
       'graphics/cpu/arm/filters/FEBlendNEON.h',
       'graphics/cpu/arm/filters/FECompositeArithmeticNEON.h',
       'graphics/cpu/arm/filters/FEGaussianBlurNEON.h',
       'graphics/cpu/arm/filters/NEONHelpers.h',
+      'graphics/cpu/arm/filters/FilterEffectNEON.h',
+      'graphics/cpu/arm/gpu/WebGLImageConversionNEON.h',
       'graphics/filters/FEBlend.cpp',
       'graphics/filters/FEBlend.h',
       'graphics/filters/FEColorMatrix.cpp',
       'graphics/filters/FEColorMatrix.h',
       'graphics/filters/FEComponentTransfer.cpp',
       'graphics/filters/FEComponentTransfer.h',
       'graphics/filters/FEComposite.cpp',
       'graphics/filters/FEComposite.h',
       'graphics/filters/FEConvolveMatrix.cpp',
       'graphics/filters/FEConvolveMatrix.h',
@@ skipping 475 matching lines @@
       'graphics/ImageFrameGeneratorTest.cpp',
       'graphics/ImageLayerChromiumTest.cpp',
       'graphics/test/MockImageDecoder.h',
       'graphics/test/MockWebGraphicsContext3D.h',
       'image-decoders/gif/GIFImageDecoderTest.cpp',
       'image-decoders/jpeg/JPEGImageDecoderTest.cpp',
       'image-decoders/webp/WEBPImageDecoderTest.cpp',
     ],
   },
 }