cc: Increment the ref count when assigning the SkImageFilter

cc/render_pass.h

Index: cc/render_pass.h
diff --git a/cc/render_pass.h b/cc/render_pass.h
index e14b5e6d97be36eca25ccd83c3cb427f61668fec..9941b260e4ad62e360b41cc5aebedb851bfe3258 100644
--- a/cc/render_pass.h
+++ b/cc/render_pass.h
@@ -13,13 +13,13 @@
 #include "cc/scoped_ptr_vector.h"
 #include "cc/shared_quad_state.h"
 #include "third_party/skia/include/core/SkColor.h"
+#include "third_party/skia/include/core/SkImageFilter.h"
+#include "third_party/skia/include/core/SkRefCnt.h"
 #include "ui/gfx/rect_f.h"
 #include <public/WebFilterOperations.h>
 #include <public/WebTransformationMatrix.h>
 #include <vector>
 
-class SkImageFilter;
-
 namespace cc {
 
 // A list of DrawQuad objects, sorted internally in front-to-back order.
@@ -75,7 +75,7 @@ class CC_EXPORT RenderPass {
               bool has_transparent_background,
               bool has_occlusion_from_outside_target_surface,
               const WebKit::WebFilterOperations& filters,
-              SkImageFilter* filter,
+              const SkRefPtr<SkImageFilter>& filter,
               const WebKit::WebFilterOperations& background_filters);
 
   // Uniquely identifies the render pass in the compositor's current frame.
@@ -100,7 +100,7 @@ class CC_EXPORT RenderPass {
   // pass' texture.
   WebKit::WebFilterOperations filters;
   // Post-processing filter applied to the pixels in the render pass' texture.
-  SkImageFilter* filter;
+  SkRefPtr<SkImageFilter> filter;
 
   // Post-processing filters, applied to the pixels showing through the
   // background of the render pass, from behind it.