Update bench to be able to preprocess skps

src/gpu/SkGpuDevice.cpp

Index: src/gpu/SkGpuDevice.cpp
===================================================================
--- src/gpu/SkGpuDevice.cpp	(revision 14136)
+++ src/gpu/SkGpuDevice.cpp	(working copy)
@@ -1918,8 +1918,12 @@
     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);