enable conservative clips for gpudevice

TBR=bsalomon

Author: reed@google.com

Review URL: https://codereview.chromium.org/587793003
diff --git a/src/gpu/SkGpuDevice.h b/src/gpu/SkGpuDevice.h
index 419013f..dc59009 100644
--- a/src/gpu/SkGpuDevice.h
+++ b/src/gpu/SkGpuDevice.h
@@ -154,7 +154,7 @@
     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.