Respect colorSpace in DecodingImageGenerator::onGetPixels()

third_party/WebKit/Source/platform/image-decoders/ImageDecoder.h

Index: third_party/WebKit/Source/platform/image-decoders/ImageDecoder.h
diff --git a/third_party/WebKit/Source/platform/image-decoders/ImageDecoder.h b/third_party/WebKit/Source/platform/image-decoders/ImageDecoder.h
index 4cf7f23eaeb0cae45c9583eb7863b5741b8e0a9b..82d81b0e755f24daa532bad1ebb63c1248ea292d 100644
--- a/third_party/WebKit/Source/platform/image-decoders/ImageDecoder.h
+++ b/third_party/WebKit/Source/platform/image-decoders/ImageDecoder.h
@@ -226,6 +226,10 @@ class PLATFORM_EXPORT ImageDecoder {
   // Transformation from embedded color space to target color space.
   SkColorSpaceXform* colorTransform();
 
+  AlphaOption alphaOption() const {
+    return m_premultiplyAlpha ? AlphaPremultiplied : AlphaNotPremultiplied;
+  }
+
   // Sets the "decode failure" flag.  For caller convenience (since so
   // many callers want to return false after calling this), returns false
   // to enable easy tailcalling.  Subclasses may override this to also