Add histograms for animated image types

third_party/WebKit/Source/platform/image-decoders/png/PNGImageReader.cpp

Index: third_party/WebKit/Source/platform/image-decoders/png/PNGImageReader.cpp
diff --git a/third_party/WebKit/Source/platform/image-decoders/png/PNGImageReader.cpp b/third_party/WebKit/Source/platform/image-decoders/png/PNGImageReader.cpp
index ccfd5fcd211ba2571fc51718cd0fef3552fc1dc9..f7ecd40869adc9db10519d97ae8257fdd3a4f7aa 100644
--- a/third_party/WebKit/Source/platform/image-decoders/png/PNGImageReader.cpp
+++ b/third_party/WebKit/Source/platform/image-decoders/png/PNGImageReader.cpp
@@ -39,6 +39,7 @@
 #include "platform/image-decoders/png/PNGImageReader.h"
 
 #include <memory>
+#include "platform/graphics/BitmapImageMetrics.h"
 #include "platform/image-decoders/FastSharedBufferReader.h"
 #include "platform/image-decoders/SegmentReader.h"
 #include "platform/image-decoders/png/PNGImageDecoder.h"
@@ -535,6 +536,10 @@ bool PNGImageReader::parseSize(const FastSharedBufferReader& reader) {
       if (!m_isAnimated || 1 == m_reportedFrameCount)
         m_decoder->setRepetitionCount(cAnimationNone);
       m_decoder->headerAvailable();
+      if (m_isAnimated) {
+        BitmapImageMetrics::countAnimatedImageType(
+            BitmapImageMetrics::AnimatedPNG);
+      }
       return true;
     }