Start to propagate constness of GrPipelineBuilder up the stack

src/gpu/GrSWMaskHelper.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrSWMaskHelper.h"
 
 #include "GrPipelineBuilder.h"
@@ skipping 356 matching lines @@
     maskMatrix.setIDiv(texture->width(), texture->height());
     maskMatrix.preTranslate(SkIntToScalar(-rect.fLeft), SkIntToScalar(-rect.fTop));
 
     pipelineBuilder->addCoverageProcessor(
                          GrSimpleTextureEffect::Create(pipelineBuilder->getProcessorDataManager(),
                                                        texture,
                                                        maskMatrix,
                                                        GrTextureParams::kNone_FilterMode,
                                                        kDevice_GrCoordSet))->unref();
 
-    target->drawBWRect(pipelineBuilder, color, SkMatrix::I(), dstRect, NULL, &invert);
+    target->drawBWRect(*pipelineBuilder, color, SkMatrix::I(), dstRect, NULL, &invert);
 }