Force checking of all color, stencil and FBO allocations for SkSurface_Gpu. This fixes the software…

src/image/SkSurface_Gpu.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 "SkSurface_Base.h"
 #include "SkImagePriv.h"
 #include "SkCanvas.h"
@@ skipping 108 matching lines @@
 
 SkSurface* SkSurface::NewRenderTarget(GrContext* ctx, const SkImage::Info& info, int sampleCount) {
     if (NULL == ctx) {
         return NULL;
     }
 
     bool isOpaque;
     SkBitmap::Config config = SkImageInfoToBitmapConfig(info, &isOpaque);
 
     GrTextureDesc desc;
-    desc.fFlags = kRenderTarget_GrTextureFlagBit;
+    desc.fFlags = kRenderTarget_GrTextureFlagBit | kCheckAllocation_GrTextureFlagBit;
     desc.fWidth = info.fWidth;
     desc.fHeight = info.fHeight;
     desc.fConfig = SkBitmapConfig2GrPixelConfig(config);
     desc.fSampleCnt = sampleCount;
 
     SkAutoTUnref<GrTexture> tex(ctx->createUncachedTexture(desc, NULL, 0));
     if (NULL == tex) {
         return NULL;
     }
 
     return SkNEW_ARGS(SkSurface_Gpu, (ctx, tex->asRenderTarget()));
 }