enable conservative clips for gpudevice

src/gpu/SkGpuDevice.h

Index: src/gpu/SkGpuDevice.h
diff --git a/src/gpu/SkGpuDevice.h b/src/gpu/SkGpuDevice.h
index 419013f4ae5009252c62e427eb6f6b242fafd063..dc59009daee8b947d9db62058b4738a305e18a84 100644
--- a/src/gpu/SkGpuDevice.h
+++ b/src/gpu/SkGpuDevice.h
@@ -154,7 +154,7 @@ private:
     virtual SkImageFilter::Cache* getImageFilterCache() SK_OVERRIDE;
 
     // temporarily change the return to false, until we understand the issues with filters and persp
-    virtual bool forceConservativeRasterClip() const SK_OVERRIDE { return false; }
+    virtual bool forceConservativeRasterClip() const SK_OVERRIDE { return true; }
 
     // sets the render target, clip, and matrix on GrContext. Use forceIdenity to override
     // SkDraw's matrix and draw in device coords.