Check for xfer barriers in GrBatch, auto-issue barriers in GrGpu

src/gpu/GrTargetCommands.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrTargetCommands.h"
 
 #include "GrBufferedDrawTarget.h"
@@ skipping 57 matching lines @@
         gpu->buildProgramDesc(&fState->fDesc, *fState->fPrimitiveProcessor, *fState->getPipeline(),
                               fState->fBatchTracker);
         fState->fCompiled = true;
     }
     GrPathRendering::DrawPathArgs args(fState->fPrimitiveProcessor.get(), fState->getPipeline(),
                                        &fState->fDesc, &fState->fBatchTracker, &fStencilSettings);
     gpu->pathRendering()->drawPaths(args, this->pathRange(), fIndices, fIndexType, fTransforms,
                                     fTransformType, fCount);
 }
 
-void GrTargetCommands::DrawBatch::execute(GrGpu*) {
+void GrTargetCommands::DrawBatch::execute(GrGpu* gpu) {
     fBatchTarget->flushNext(fBatch->numberOfDraws());
 }
 
 void GrTargetCommands::Clear::execute(GrGpu* gpu) {
     if (GrColor_ILLEGAL == fColor) {
         gpu->discard(this->renderTarget());
     } else {
         gpu->clear(fRect, fColor, this->renderTarget());
     }
 }
 
 void GrTargetCommands::ClearStencilClip::execute(GrGpu* gpu) {
     gpu->clearStencilClip(fRect, fInsideClip, this->renderTarget());
 }
 
 void GrTargetCommands::CopySurface::execute(GrGpu* gpu) {
     gpu->copySurface(this->dst(), this->src(), fSrcRect, fDstPoint);
 }
-
-void GrTargetCommands::XferBarrier::execute(GrGpu* gpu) {
-    gpu->xferBarrier(fRenderTarget.get(), fBarrierType);
-}