Use UMA to track characteristics of dst color spaces

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"
 #include "wtf/Allocator.h"
 #include "wtf/Forward.h"
 
 namespace blink {
 
 class PLATFORM_EXPORT BitmapImageMetrics {
     STATIC_ONLY(BitmapImageMetrics);
 public:
     // Values synced with 'DecodedImageType' in src/tools/metrics/histograms/histograms.xml
     enum DecodedImageType {
         ImageUnknown = 0,
         ImageJPEG = 1,
         ImagePNG = 2,
         ImageGIF = 3,
         ImageWebP = 4,
         ImageICO = 5,
         ImageBMP = 6,
         DecodedImageTypeEnumEnd = ImageBMP + 1
     };
 
+    enum Gamma {
+        // Values synced with 'Gamma' in src/tools/metrics/histograms/histograms.xml
+        GammaLinear = 0,
+        GammaSRGB = 1,
+        Gamma2Dot2 = 2,
+        GammaNonStandard = 3,
+        GammaEmpty = 4,
+        GammaNull = 5,
+        GammaFail = 6,
+        GammaEnd = GammaFail + 1,
+    };
+
     static void countDecodedImageType(const String& type);
     static void countImageOrientation(const ImageOrientationEnum);
+    static void countGamma(SkColorSpace*);
 };
 
 } // namespace blink
 
 #endif