Fix ImageDecoder::frameIsCompleteAtIndex - fully received instead of decoded.

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 21cc9616ae5159c5e1f62bbe3c868348cf5a06d0..b541b4690f82d139ee0db2b2e9fc9748f5e88c77 100644
--- a/third_party/WebKit/Source/platform/image-decoders/ImageDecoder.h
+++ b/third_party/WebKit/Source/platform/image-decoders/ImageDecoder.h
@@ -153,6 +153,12 @@ public:
         return !m_failed && m_sizeAvailable;
     }
 
+    // Whether the requested frame is fully decoded.
+    inline bool frameIsCompleteAtIndex(size_t frameIndex) const
+    {
+        return (frameIndex < m_frameBufferCache.size()) && (m_frameBufferCache[frameIndex].getStatus() == ImageFrame::FrameComplete);
+    }
+
     virtual IntSize size() const { return m_size; }
 
     // Decoders which downsample images should override this method to
@@ -212,7 +218,7 @@ public:
     virtual bool frameHasAlphaAtIndex(size_t) const;
 
     // Whether or not the frame is fully received.
-    virtual bool frameIsCompleteAtIndex(size_t) const;
+    virtual bool frameIsFullyReceivedAtIndex(size_t) const;
 
     // Duration for displaying a frame in seconds. This method is only used by
     // animated images.