Track positions of dimensions in image files

third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoder.h

Index: third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoder.h
diff --git a/third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoder.h b/third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoder.h
index f9aa02c42e4c4174ef5844a4f2e57371150e9849..64e6a9236fc332fb5cc9787b5baa7ef7974195c6 100644
--- a/third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoder.h
+++ b/third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoder.h
@@ -61,8 +61,10 @@ public:
     bool haveDecodedRow(size_t frameIndex, GIFRow::const_iterator rowBegin, size_t width, size_t rowNumber, unsigned repeatCount, bool writeTransparentPixels);
     bool frameComplete(size_t frameIndex);
 
-    // For testing.
+    // For testing and metrics.
     bool parseCompleted() const;
+    void setSizeOffset(size_t);
+    void setSizeOffsetOptimized(size_t);
 
 private:
     // ImageDecoder:
@@ -87,6 +89,8 @@ private:
     bool m_currentBufferSawAlpha;
     mutable int m_repetitionCount;
     OwnPtr<GIFImageReader> m_reader;
+    size_t m_sizeOffset;
+    size_t m_sizeOffsetOptimized;
 };
 
 } // namespace blink