Add caps overrides to GMs

gm/gm.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef skiagm_DEFINED
 #define skiagm_DEFINED
 
 #include "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkPaint.h"
 #include "SkSize.h"
 #include "SkString.h"
 #include "SkTRegistry.h"
 #include "sk_tool_utils.h"
 
 class SkAnimTimer;
-
-#if SK_SUPPORT_GPU
-#include "GrContext.h"
-#endif
+struct GrContextOptions;
 
 #define DEF_GM(code) \
     static skiagm::GM*          SK_MACRO_APPEND_LINE(F_)(void*) { code; } \
     static skiagm::GMRegistry   SK_MACRO_APPEND_LINE(R_)(SK_MACRO_APPEND_LINE(F_));
 
 // See colorwheel.cpp for example usage.
 #define DEF_SIMPLE_GM(NAME, CANVAS, W, H)                               \
     static void SK_MACRO_CONCAT(NAME, _GM)(SkCanvas* CANVAS);           \
     DEF_GM( return SkNEW_ARGS(skiagm::SimpleGM,                         \
                               (SkString(#NAME),                         \
@@ skipping 55 matching lines @@
             fCanvasIsDeferred = isDeferred;
         }
 
         const SkMatrix& getStarterMatrix() { return fStarterMatrix; }
         void setStarterMatrix(const SkMatrix& matrix) {
             fStarterMatrix = matrix;
         }
 
         bool animate(const SkAnimTimer&);
 
+        virtual void modifyGrContextOptions(GrContextOptions* options) {}
+
     protected:
         /** draws a standard message that the GM is only intended to be used with the GPU.*/
         void drawGpuOnlyMessage(SkCanvas*);
         virtual void onOnceBeforeDraw() {}
         virtual void onDraw(SkCanvas*) = 0;
         virtual void onDrawBackground(SkCanvas*);
         virtual SkISize onISize() = 0;
         virtual SkString onShortName() = 0;
 
         virtual bool onAnimate(const SkAnimTimer&) { return false; }
@@ skipping 21 matching lines @@
         SkISize onISize() override;
         SkString onShortName() override;
     private:
         SkString fName;
         void (*fDrawProc)(SkCanvas*);
         SkISize fSize;
     };
 }
 
 #endif