Expose more gamma info for UMA statistics

include/core/SkColorSpace.h

Index: include/core/SkColorSpace.h
diff --git a/include/core/SkColorSpace.h b/include/core/SkColorSpace.h
index 57f74e985d9a732b0d6416046cb13ed1b003249f..2bf2ed0de6ded1088048690d29952f0dae1bd75c 100644
--- a/include/core/SkColorSpace.h
+++ b/include/core/SkColorSpace.h
@@ -42,10 +42,14 @@ public:
 
         /**
          *  Gamma is represented by a look-up table, a parametric curve, or an uncommon
-         *  exponential curve.  Or there is an additional pre-processing step before the
-         *  applying the gamma.
+         *  exponential curve.  Or the R, G, and B gammas do not match.
          */
         kNonStandard_GammaNamed,
+
+        /**
+         *  To be used by UMA code only.  ICC profiles lacks valid gamma representation.
+         */
+        kInvalid_GammaNamed,
     };
 
     /**
@@ -78,6 +82,15 @@ public:
     }
 
     /**
+     *  To be used only by UMA code.
+     */
+    bool gammasAreMatching() const;
+    bool gammasAreNamed() const;
+    bool gammasAreValues() const;
+    bool gammasAreTables() const;
+    bool gammasAreParams() const;
+
+    /**
      *  Returns nullptr on failure.  Fails when we fallback to serializing ICC data and
      *  the data is too large to serialize.
      */