Simplify SkColorSpace DstGamma UMA

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 17 matching lines @@
 {
     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();
-
+        // TODO (msarett): Add a check for gammaIsLinear() when that API lands in Skia.
         Gamma gamma;
-        switch (skGamma) {
-        case SkColorSpace::kLinear_GammaNamed:
-            gamma = GammaLinear;
-            break;
-        case SkColorSpace::kSRGB_GammaNamed:
+        if (colorSpace->gammaCloseToSRGB()) {
             gamma = GammaSRGB;
-            break;
-        case SkColorSpace::k2Dot2Curve_GammaNamed:
-            gamma = Gamma2Dot2;
-            break;
-        default:
-            if (colorSpace->gammasAreMatching()) {
-                if (colorSpace->gammasAreValues()) {
-                    gamma = GammaExponent;
-                } else if (colorSpace->gammasAreParams()) {
-                    gamma = GammaParametric;
-                } else if (colorSpace->gammasAreTables()) {
-                    gamma = GammaTable;
-                } else if (colorSpace->gammasAreNamed()) {
-                    gamma = GammaNamed;
-                } else {
-                    gamma = GammaFail;
-                }
-            } else {
-                gamma = GammaNonStandard;
-            }
-            break;
+        } else {
+            gamma = GammaNonStandard;
         }
 
         gammaNamedHistogram.count(gamma);
     } else {
         gammaNamedHistogram.count(GammaNull);
     }
 }
 
 } // namespace blink