Add histograms for animated image types

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BitmapImageMetrics_h
 #define BitmapImageMetrics_h
 
 #include "platform/PlatformExport.h"
 #include "platform/graphics/ImageOrientation.h"
 #include "third_party/skia/include/core/SkColorSpace.h"
@@ skipping 12 matching lines @@
     ImageUnknown = 0,
     ImageJPEG = 1,
     ImagePNG = 2,
     ImageGIF = 3,
     ImageWebP = 4,
     ImageICO = 5,
     ImageBMP = 6,
     DecodedImageTypeEnumEnd = ImageBMP + 1
   };
 
+  // Values synced with 'AnimatedImageType' in
+  // src/tools/metrics/histograms/histograms.xml
+  enum AnimatedImageType {
+    AnimatedGIF = 0,
+    AnimatedWEBP = 1,
+    AnimatedPNG = 2,
+    AnimatedImageTypeEnumEnd = AnimatedPNG + 1
+  };
+
   enum Gamma {
     // Values synced with 'Gamma' in src/tools/metrics/histograms/histograms.xml
     GammaLinear = 0,
     GammaSRGB = 1,
     Gamma2Dot2 = 2,
     GammaNonStandard = 3,
     GammaNull = 4,
     GammaFail = 5,
     GammaInvalid = 6,
     GammaExponent = 7,
     GammaTable = 8,
     GammaParametric = 9,
     GammaNamed = 10,
     GammaEnd = GammaNamed + 1,
   };
 
   static void countDecodedImageType(const String& type);
+  static void countAnimatedImageType(AnimatedImageType);
   static void countImageOrientation(const ImageOrientationEnum);
   static void countImageGammaAndGamut(SkColorSpace*);
   static void countOutputGammaAndGamut(SkColorSpace*);
 
  private:
   static Gamma getColorSpaceGamma(SkColorSpace*);
 };
 
 }  // namespace blink
 
 #endif