Force checking of all color, stencil and FBO allocations for SkSurface_Gpu. This fixes the software canvas fallback in Chrome.

R=bsalomon@google.com

Review URL: https://codereview.chromium.org/15643013

git-svn-id: http://skia.googlecode.com/svn/trunk@9487 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/image/SkSurface_Gpu.cpp b/src/image/SkSurface_Gpu.cpp
index 687ca6c..154f179 100644
--- a/src/image/SkSurface_Gpu.cpp
+++ b/src/image/SkSurface_Gpu.cpp
@@ -126,7 +126,7 @@
     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);