Update comments regarding image caching

third_party/WebKit/Source/core/fetch/ImageResource.h

Index: third_party/WebKit/Source/core/fetch/ImageResource.h
diff --git a/third_party/WebKit/Source/core/fetch/ImageResource.h b/third_party/WebKit/Source/core/fetch/ImageResource.h
index 43eeabf34b94c428a1504b569be43dc684c485ac..786f07b261fcd96960ec52f84e7991ae088a1d3f 100644
--- a/third_party/WebKit/Source/core/fetch/ImageResource.h
+++ b/third_party/WebKit/Source/core/fetch/ImageResource.h
@@ -60,8 +60,6 @@ public:
     blink::Image* image(); // Returns the nullImage() if the image is not available yet.
     bool hasImage() const { return m_image.get(); }
     // Side effect: ensures decoded image is in cache, therefore should only be called when about to draw the image.
-    // FIXME: Decoding image on the main thread is expensive, so rather than forcing decode, consider returning false
-    // when image is not decoded yet, as we do in case of deferred decoding.
     bool currentFrameKnownToBeOpaque(const LayoutObject*);
 
     static std::pair<blink::Image*, float> brokenImage(float deviceScaleFactor); // Returns an image and the image's resolution scale factor.