[WIP] Supporting arm_neon_optional flag for blink platform.

Source/platform/graphics/cpu/arm/gpu/WebGLImageConversionNEON.h

Index: Source/platform/graphics/cpu/arm/gpu/WebGLImageConversionNEON.h
diff --git a/Source/platform/graphics/cpu/arm/WebGLImageConversionNEON.h b/Source/platform/graphics/cpu/arm/gpu/WebGLImageConversionNEON.h
similarity index 90%
rename from Source/platform/graphics/cpu/arm/WebGLImageConversionNEON.h
rename to Source/platform/graphics/cpu/arm/gpu/WebGLImageConversionNEON.h
index 28195124c627f203e7a694c3674b3054087bbdb0..915a7019f6b3eb868df2cb3dc4530f39348749c9 100644
--- a/Source/platform/graphics/cpu/arm/WebGLImageConversionNEON.h
+++ b/Source/platform/graphics/cpu/arm/gpu/WebGLImageConversionNEON.h
@@ -34,7 +34,7 @@ namespace blink {
 
 namespace SIMD {
 
-ALWAYS_INLINE void unpackOneRowOfRGBA16LittleToRGBA8(const uint16_t*& source, uint8_t*& destination, unsigned& pixelsPerRow)
+ALWAYS_INLINE void unpackOneRowOfRGBA16LittleToRGBA8NEON(const uint16_t*& source, uint8_t*& destination, unsigned& pixelsPerRow)
 {
     unsigned componentsPerRow = pixelsPerRow * 4;
     unsigned tailComponents = componentsPerRow % 16;
@@ -51,7 +51,7 @@ ALWAYS_INLINE void unpackOneRowOfRGBA16LittleToRGBA8(const uint16_t*& source, ui
     pixelsPerRow = tailComponents / 4;
 }
 
-ALWAYS_INLINE void unpackOneRowOfRGB16LittleToRGBA8(const uint16_t*& source, uint8_t*& destination, unsigned& pixelsPerRow)
+ALWAYS_INLINE void unpackOneRowOfRGB16LittleToRGBA8NEON(const uint16_t*& source, uint8_t*& destination, unsigned& pixelsPerRow)
 {
     unsigned componentsPerRow = pixelsPerRow * 3;
     unsigned tailComponents = componentsPerRow % 24;
@@ -72,7 +72,7 @@ ALWAYS_INLINE void unpackOneRowOfRGB16LittleToRGBA8(const uint16_t*& source, uin
     pixelsPerRow = tailComponents / 3;
 }
 
-ALWAYS_INLINE void unpackOneRowOfARGB16LittleToRGBA8(const uint16_t*& source, uint8_t*& destination, unsigned& pixelsPerRow)
+ALWAYS_INLINE void unpackOneRowOfARGB16LittleToRGBA8NEON(const uint16_t*& source, uint8_t*& destination, unsigned& pixelsPerRow)
 {
     unsigned componentsPerRow = pixelsPerRow * 4;
     unsigned tailComponents = componentsPerRow % 32;
@@ -93,7 +93,7 @@ ALWAYS_INLINE void unpackOneRowOfARGB16LittleToRGBA8(const uint16_t*& source, ui
     pixelsPerRow = tailComponents / 4;
 }
 
-ALWAYS_INLINE void unpackOneRowOfBGRA16LittleToRGBA8(const uint16_t*& source, uint8_t*& destination, unsigned& pixelsPerRow)
+ALWAYS_INLINE void unpackOneRowOfBGRA16LittleToRGBA8NEON(const uint16_t*& source, uint8_t*& destination, unsigned& pixelsPerRow)
 {
     unsigned componentsPerRow = pixelsPerRow * 4;
     unsigned tailComponents = componentsPerRow % 32;
@@ -114,7 +114,7 @@ ALWAYS_INLINE void unpackOneRowOfBGRA16LittleToRGBA8(const uint16_t*& source, ui
     pixelsPerRow = tailComponents / 4;
 }
 
-ALWAYS_INLINE void unpackOneRowOfRGBA4444ToRGBA8(const uint16_t*& source, uint8_t*& destination, unsigned& pixelsPerRow)
+ALWAYS_INLINE void unpackOneRowOfRGBA4444ToRGBA8NEON(const uint16_t*& source, uint8_t*& destination, unsigned& pixelsPerRow)
 {
     unsigned tailPixels = pixelsPerRow % 8;
     unsigned pixelSize = pixelsPerRow - tailPixels;
@@ -142,7 +142,7 @@ ALWAYS_INLINE void unpackOneRowOfRGBA4444ToRGBA8(const uint16_t*& source, uint8_
     pixelsPerRow = tailPixels;
 }
 
-ALWAYS_INLINE void packOneRowOfRGBA8ToUnsignedShort4444(const uint8_t*& source, uint16_t*& destination, unsigned& pixelsPerRow)
+ALWAYS_INLINE void packOneRowOfRGBA8ToUnsignedShort4444NEON(const uint8_t*& source, uint16_t*& destination, unsigned& pixelsPerRow)
 {
     unsigned componentsPerRow = pixelsPerRow * 4;
     unsigned tailComponents = componentsPerRow % 32;
@@ -170,7 +170,7 @@ ALWAYS_INLINE void packOneRowOfRGBA8ToUnsignedShort4444(const uint8_t*& source,
     pixelsPerRow = tailComponents / 4;
 }
 
-ALWAYS_INLINE void unpackOneRowOfRGBA5551ToRGBA8(const uint16_t*& source, uint8_t*& destination, unsigned& pixelsPerRow)
+ALWAYS_INLINE void unpackOneRowOfRGBA5551ToRGBA8NEON(const uint16_t*& source, uint8_t*& destination, unsigned& pixelsPerRow)
 {
     unsigned tailPixels = pixelsPerRow % 8;
     unsigned pixelSize = pixelsPerRow - tailPixels;
@@ -202,7 +202,7 @@ ALWAYS_INLINE void unpackOneRowOfRGBA5551ToRGBA8(const uint16_t*& source, uint8_
     pixelsPerRow = tailPixels;
 }
 
-ALWAYS_INLINE void packOneRowOfRGBA8ToUnsignedShort5551(const uint8_t*& source, uint16_t*& destination, unsigned& pixelsPerRow)
+ALWAYS_INLINE void packOneRowOfRGBA8ToUnsignedShort5551NEON(const uint8_t*& source, uint16_t*& destination, unsigned& pixelsPerRow)
 {
     unsigned componentsPerRow = pixelsPerRow * 4;
     unsigned tailComponents = componentsPerRow % 32;
@@ -234,7 +234,7 @@ ALWAYS_INLINE void packOneRowOfRGBA8ToUnsignedShort5551(const uint8_t*& source,
     pixelsPerRow = tailComponents / 4;
 }
 
-ALWAYS_INLINE void unpackOneRowOfRGB565ToRGBA8(const uint16_t*& source, uint8_t*& destination, unsigned& pixelsPerRow)
+ALWAYS_INLINE void unpackOneRowOfRGB565ToRGBA8NEON(const uint16_t*& source, uint8_t*& destination, unsigned& pixelsPerRow)
 {
     unsigned tailPixels = pixelsPerRow % 8;
     unsigned pixelSize = pixelsPerRow - tailPixels;
@@ -266,7 +266,7 @@ ALWAYS_INLINE void unpackOneRowOfRGB565ToRGBA8(const uint16_t*& source, uint8_t*
     pixelsPerRow = tailPixels;
 }
 
-ALWAYS_INLINE void packOneRowOfRGBA8ToUnsignedShort565(const uint8_t*& source, uint16_t*& destination, unsigned& pixelsPerRow)
+ALWAYS_INLINE void packOneRowOfRGBA8ToUnsignedShort565NEON(const uint8_t*& source, uint16_t*& destination, unsigned& pixelsPerRow)
 {
     unsigned componentsPerRow = pixelsPerRow * 4;
     unsigned tailComponents = componentsPerRow % 32;