Avoid copy pixel data in texImage2D(ImageBitmap)

third_party/WebKit/Source/platform/graphics/gpu/WebGLImageConversion.cpp

Index: third_party/WebKit/Source/platform/graphics/gpu/WebGLImageConversion.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/gpu/WebGLImageConversion.cpp b/third_party/WebKit/Source/platform/graphics/gpu/WebGLImageConversion.cpp
index e9eee504a9d39d6a1066424f069df9247bd2fbd3..a12ac2445e45a64296c6706fd4001087968f5185 100644
--- a/third_party/WebKit/Source/platform/graphics/gpu/WebGLImageConversion.cpp
+++ b/third_party/WebKit/Source/platform/graphics/gpu/WebGLImageConversion.cpp
@@ -2313,6 +2313,7 @@ bool WebGLImageConversion::packImageData(
 
 bool WebGLImageConversion::extractImageData(
     const uint8_t* imageData,
+    DataFormat sourceDataFormat,
     const IntSize& imageDataSize,
     GLenum format,
     GLenum type,
@@ -2333,7 +2334,7 @@ bool WebGLImageConversion::extractImageData(
         return false;
     data.resize(packedSize);
 
-    if (!packPixels(imageData, DataFormatRGBA8, width, height, 0, format, type, premultiplyAlpha ? AlphaDoPremultiply : AlphaDoNothing, data.data(), flipY))
+    if (!packPixels(imageData, sourceDataFormat, width, height, 0, format, type, premultiplyAlpha ? AlphaDoPremultiply : AlphaDoNothing, data.data(), flipY))
         return false;
 
     return true;