Implement GPU occluded blur mask filter

src/gpu/SkGpuDevice.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 "SkGpuDevice.h"
 
 #include "GrBlurUtils.h"
@@ skipping 424 matching lines @@
                     if (draw.fRC->quickReject(finalIRect)) {
                         // clipped out
                         return;
                     }
                     if (paint.getMaskFilter()->directFilterRRectMaskGPU(fContext,
                                                                         fDrawContext.get(),
                                                                         &grPaint,
                                                                         fClip,
                                                                         *draw.fMatrix,
                                                                         style.strokeRec(),
+                                                                        rrect,
                                                                         devRRect)) {
                         return;
                     }
                 }
 
             }
         }
     }
 
     if (paint.getMaskFilter() || style.pathEffect()) {
@@ skipping 1298 matching lines @@
 }
 
 SkImageFilterCache* SkGpuDevice::getImageFilterCache() {
     ASSERT_SINGLE_OWNER
     // We always return a transient cache, so it is freed after each
     // filter traversal.
     return SkImageFilterCache::Create(kDefaultImageFilterCacheSize);
 }
 
 #endif