Remove gamma field from SkDeviceProperties

src/gpu/GrAtlasTextContext.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrAtlasTextContext_DEFINED
 #define GrAtlasTextContext_DEFINED
 
@@ skipping 348 matching lines @@
                                                  const SkPaint&, const SkMatrix& viewMatrix,
                                                  const char text[], size_t byteLength,
                                                  const SkScalar pos[], int scalarsPerPosition,
                                                  const SkPoint& offset,
                                                  const SkIRect& regionClipBounds);
 
     // Distance field text needs this table to compute a value for use in the fragment shader.
     // Because the GrAtlasTextContext can go out of scope before the final flush, this needs to be
     // refcnted and malloced
     struct DistanceAdjustTable : public SkNVRefCnt<DistanceAdjustTable> {
-        DistanceAdjustTable(float gamma) { this->buildDistanceAdjustTable(gamma); }
+        DistanceAdjustTable() { this->buildDistanceAdjustTable(); }
         ~DistanceAdjustTable() { SkDELETE_ARRAY(fTable); }
 
-        void buildDistanceAdjustTable(float gamma);
-
-        SkScalar& operator[] (int i) {
-            return fTable[i];
-        }
-
         const SkScalar& operator[] (int i) const {
             return fTable[i];
         }
 
+    private:
+        void buildDistanceAdjustTable();
+
         SkScalar* fTable;
     };
 
     GrBatchTextStrike* fCurrStrike;
     GrTextBlobCache* fCache;
     SkAutoTUnref<DistanceAdjustTable> fDistanceAdjustTable;
 
     friend class GrTextBlobCache;
     friend class BitmapTextBatch;
 
 #ifdef GR_TEST_UTILS
     BATCH_TEST_FRIEND(TextBlobBatch);
 #endif
 
     typedef GrTextContext INHERITED;
 };
 
 #endif