Add debug option to clip each GrBatch to its device bounds

src/gpu/GrClipMaskManager.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef GrClipMaskManager_DEFINED
 #define GrClipMaskManager_DEFINED
 
 #include "GrPipelineBuilder.h"
@@ skipping 37 matching lines @@
 /**
  * The clip mask creator handles the generation of the clip mask. If anti
  * aliasing is requested it will (in the future) generate a single channel
  * (8bit) mask. If no anti aliasing is requested it will generate a 1-bit
  * mask in the stencil buffer. In the non anti-aliasing case, if the clip
  * mask can be represented as a rectangle then scissoring is used. In all
  * cases scissoring is used to bound the range of the clip mask.
  */
 class GrClipMaskManager : SkNoncopyable {
 public:
-    GrClipMaskManager(GrDrawTarget* owner);
+    GrClipMaskManager(GrDrawTarget* owner, bool debugClipBatchToBounds);
 
     /**
      * Creates a clip mask if necessary as a stencil buffer or alpha texture
      * and sets the GrGpu's scissor and stencil state. If the return is false
      * then the draw can be skipped. The AutoRestoreEffects is initialized by
      * the manager when it must install additional effects to implement the
      * clip. devBounds is optional but can help optimize clipping.
      */
     bool setupClipping(const GrPipelineBuilder&,
                        GrPipelineBuilder::AutoRestoreStencil*,
@@ skipping 95 matching lines @@
     void adjustStencilParams(GrStencilSettings* settings,
                              StencilClipMode mode,
                              int stencilBitCnt);
 
     GrTexture* createCachedMask(int width, int height, const GrUniqueKey& key, bool renderTarget);
 
     static const int kMaxAnalyticElements = 4;
 
     GrDrawTarget*   fDrawTarget;    // This is our owning draw target.
     StencilClipMode fClipMode;
+    bool            fDebugClipBatchToBounds;
 
     typedef SkNoncopyable INHERITED;
 };
 #endif // GrClipMaskManager_DEFINED