Use UMA to track characteristics of dst color spaces

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

 // 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.
 
 #include "platform/graphics/BitmapImageMetrics.h"
 
 #include "platform/Histogram.h"
 #include "wtf/Threading.h"
 #include "wtf/text/WTFString.h"
 
@@ skipping 12 matching lines @@
     DEFINE_THREAD_SAFE_STATIC_LOCAL(EnumerationHistogram, decodedImageTypeHistogram, new EnumerationHistogram("Blink.DecodedImageType", DecodedImageTypeEnumEnd));
     decodedImageTypeHistogram.count(decodedImageType);
 }
 
 void BitmapImageMetrics::countImageOrientation(const ImageOrientationEnum orientation)
 {
     DEFINE_THREAD_SAFE_STATIC_LOCAL(EnumerationHistogram, orientationHistogram, new EnumerationHistogram("Blink.DecodedImage.Orientation", ImageOrientationEnumEnd));
     orientationHistogram.count(orientation);
 }
 
+void BitmapImageMetrics::countGamma(SkColorSpace* colorSpace)
+{
+    DEFINE_THREAD_SAFE_STATIC_LOCAL(EnumerationHistogram, gammaNamedHistogram, new EnumerationHistogram("Blink.ColorSpace.Destination", GammaEnd));
+
+    if (colorSpace) {
+        SkColorSpace::GammaNamed skGamma = colorSpace->gammaNamed();
+        Gamma gamma =
+            (SkColorSpace::kLinear_GammaNamed == skGamma)      ? GammaLinear :
+            (SkColorSpace::kSRGB_GammaNamed == skGamma)        ? GammaSRGB :
+            (SkColorSpace::k2Dot2Curve_GammaNamed == skGamma)  ? Gamma2Dot2 :
+            (SkColorSpace::kNonStandard_GammaNamed == skGamma) ? GammaNonStandard :
+            GammaFail;
+        gammaNamedHistogram.count(gamma);
+    } else {
+        gammaNamedHistogram.count(GammaNull);
+    }
+}
+
 } // namespace blink