Update bench to be able to preprocess skps

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 "effects/GrBicubicEffect.h"
@@ skipping 1900 matching lines @@
 void SkGpuDevice::EXPERIMENTAL_optimize(SkPicture* picture) {
     SkPicture::AccelData::Key key = ComputeAccelDataKey();
 
     GPUAccelData* data = SkNEW_ARGS(GPUAccelData, (key));
 
     picture->EXPERIMENTAL_addAccelData(data);
 
     GatherGPUInfo(picture, data);
 }
 
-bool SkGpuDevice::EXPERIMENTAL_drawPicture(SkPicture* picture) {
+void SkGpuDevice::EXPERIMENTAL_purge(SkPicture* picture) {
+
+}
+
+bool SkGpuDevice::EXPERIMENTAL_drawPicture(SkCanvas* canvas, SkPicture* picture) {
 

[jvanverth1, 2014/04/10 20:23:34]

It's not clear to me where the SkCanvas* gets used. Is this for the future?

[robertphillips, 2014/04/11 11:09:06]

This is a small, salvageable chunk of my
check-that-pre-rendering-saveLayers-is-worth-it hack
(https://codereview.chromium.org/227603006/). The majority of that patch's
SkGpuDevice.cpp is unlandable.

     SkPicture::AccelData::Key key = ComputeAccelDataKey();
 
     const SkPicture::AccelData* data = picture->EXPERIMENTAL_getAccelData(key);
     if (NULL == data) {
         return false;
     }
 
     const GPUAccelData *gpuData = static_cast<const GPUAccelData*>(data);
 
 //#define SK_PRINT_PULL_FORWARD_INFO 1
@@ skipping 58 matching lines @@
             const GrAtlasedLayer* layer = fContext->getLayerCache()->findLayerOrCreate(picture, i);
 
             SkDebugf("%d (%d), ", i, layer->layerID());
         }
     }
     SkDebugf("\n");
 #endif
 
     return false;
 }