Create GrDraw and start fast pathing src over rects

src/gpu/GrDrawTarget.h

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrDrawTarget_DEFINED
 #define GrDrawTarget_DEFINED
 
@@ skipping 182 matching lines @@
         }
 
         GrContext* context() const { return fDrawTarget->fContext; }
         GrResourceProvider* resourceProvider() const { return fDrawTarget->fResourceProvider; }
         GrDrawTarget* fDrawTarget;
         friend class GrClipMaskManager;
     };
 
     const CMMAccess cmmAccess() { return CMMAccess(this); }
 
+    GrBatch* lastBatch() {
+        if (fBatches.count()) {
+            return fBatches.back();
+        } else {
+            return nullptr;
+        }
+    }
+
 private:
     void recordBatch(GrBatch*);
     bool installPipelineInDrawBatch(const GrPipelineBuilder* pipelineBuilder,
                                     const GrScissorState* scissor,
                                     GrDrawBatch* batch);
 
     // Makes a copy of the dst if it is necessary for the draw. Returns false if a copy is required
     // but couldn't be made. Otherwise, returns true.  This method needs to be protected because it
     // needs to be accessed by GLPrograms to setup a correct drawstate
     bool setupDstReadIfNecessary(const GrPipelineBuilder&,
@@ skipping 23 matching lines @@
     GrContext*                                  fContext;
     GrGpu*                                      fGpu;
     GrResourceProvider*                         fResourceProvider;
     bool                                        fFlushing;
     GrBatchToken                                fLastFlushToken;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif