Add histograms for animated image types

third_party/WebKit/Source/platform/graphics/BitmapImageMetrics.cpp

Index: third_party/WebKit/Source/platform/graphics/BitmapImageMetrics.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/BitmapImageMetrics.cpp b/third_party/WebKit/Source/platform/graphics/BitmapImageMetrics.cpp
index 0061d5dcbd8a22f521f8bb7ad8e509726b20da7d..c7c472991d52f0f85154d9134d6d7f09847a1a32 100644
--- a/third_party/WebKit/Source/platform/graphics/BitmapImageMetrics.cpp
+++ b/third_party/WebKit/Source/platform/graphics/BitmapImageMetrics.cpp
@@ -34,6 +34,14 @@ void BitmapImageMetrics::countDecodedImageType(const String& type) {
   decodedImageTypeHistogram.count(decodedImageType);
 }
 
+void BitmapImageMetrics::countAnimatedImageType(AnimatedImageType type) {
+  DEFINE_THREAD_SAFE_STATIC_LOCAL(
+      EnumerationHistogram, animatedImageTypeHistogram,
+      new EnumerationHistogram("Blink.AnimatedImageType",
+                               AnimatedImageTypeEnumEnd));
+  animatedImageTypeHistogram.count(type);
+}
+
 void BitmapImageMetrics::countImageOrientation(
     const ImageOrientationEnum orientation) {
   DEFINE_THREAD_SAFE_STATIC_LOCAL(