Add histograms for animated image types

third_party/WebKit/Source/platform/image-decoders/webp/WEBPImageDecoder.cpp

Index: third_party/WebKit/Source/platform/image-decoders/webp/WEBPImageDecoder.cpp
diff --git a/third_party/WebKit/Source/platform/image-decoders/webp/WEBPImageDecoder.cpp b/third_party/WebKit/Source/platform/image-decoders/webp/WEBPImageDecoder.cpp
index 8a3b219e91213d6ac4c1ec1b2f7388b898b32ba3..a6e93409d2a95074131af7aedc85b8048ea0f9d1 100644
--- a/third_party/WebKit/Source/platform/image-decoders/webp/WEBPImageDecoder.cpp
+++ b/third_party/WebKit/Source/platform/image-decoders/webp/WEBPImageDecoder.cpp
@@ -28,6 +28,8 @@
 
 #include "platform/image-decoders/webp/WEBPImageDecoder.h"
 
+#include "platform/graphics/BitmapImageMetrics.h"
+
 #if CPU(BIG_ENDIAN) || CPU(MIDDLE_ENDIAN)
 #error Blink assumes a little-endian target.
 #endif
@@ -213,6 +215,9 @@ bool WEBPImageDecoder::updateDemuxer() {
     if (!(m_formatFlags & ANIMATION_FLAG)) {
       m_repetitionCount = cAnimationNone;
     } else {
+      BitmapImageMetrics::countAnimatedImageType(
+          BitmapImageMetrics::AnimatedWEBP);
+
       // Since we have parsed at least one frame, even if partially,
       // the global animation (ANIM) properties have been read since
       // an ANIM chunk must precede the ANMF frame chunks.