Use dst copies in porter duffer XP to correctly render certain blends.

src/gpu/GrInOrderDrawBuffer.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrInOrderDrawBuffer.h"
 
 #include "GrBufferAllocPool.h"
@@ skipping 558 matching lines @@
 
 void GrInOrderDrawBuffer::CopySurface::execute(GrInOrderDrawBuffer* buf, const SetState*) {
     buf->getGpu()->copySurface(this->dst(), this->src(), fSrcRect, fDstPoint);
 }
 
 bool GrInOrderDrawBuffer::onCopySurface(GrSurface* dst,
                                         GrSurface* src,
                                         const SkIRect& srcRect,
                                         const SkIPoint& dstPoint) {
     if (getGpu()->canCopySurface(dst, src, srcRect, dstPoint)) {
+        this->closeBatch();
         CopySurface* cs = GrNEW_APPEND_TO_RECORDER(fCmdBuffer, CopySurface, (dst, src));
         cs->fSrcRect = srcRect;
         cs->fDstPoint = dstPoint;
         this->recordTraceMarkersIfNecessary();
         return true;
     }
     return false;
 }
 
 bool GrInOrderDrawBuffer::recordStateAndSetupPipeline(const GrPrimitiveProcessor* primProc,
@@ skipping 106 matching lines @@
     int vcount = vertexCount;
     int icount = indexCount;
 
     if (!insideGeoPush &&
         !unreleasedVertexSpace &&
         !unreleasedIndexSpace &&
         this->geometryHints(vertexStride, &vcount, &icount)) {
         this->flush();
     }
 }