cc: Move UnoccludedContentRect to Occlusion.

cc/trees/occlusion_tracker_unittest.cc

Index: cc/trees/occlusion_tracker_unittest.cc
diff --git a/cc/trees/occlusion_tracker_unittest.cc b/cc/trees/occlusion_tracker_unittest.cc
index e054e914d1d772a10d3b16379f888d5f3cf73819..297a0925adf925f203355b1e1a86c7a9c3545233 100644
--- a/cc/trees/occlusion_tracker_unittest.cc
+++ b/cc/trees/occlusion_tracker_unittest.cc
@@ -90,11 +90,12 @@ class TestOcclusionTrackerWithClip : public TestOcclusionTracker<LayerType> {
   }
 
   // Gives an unoccluded sub-rect of |content_rect| in the content space of the
-  // layer. Simple wrapper around UnoccludedContentRect.
+  // layer. Simple wrapper around GetUnoccludedContentRect.
   gfx::Rect UnoccludedLayerContentRect(const LayerType* layer,
                                        const gfx::Rect& content_rect) const {
     DCHECK(layer->visible_content_rect().Contains(content_rect));
-    return this->UnoccludedContentRect(content_rect, layer->draw_transform());
+    return this->GetCurrentOcclusionForLayer(layer->draw_transform())
+        .GetUnoccludedContentRect(content_rect);
   }
 
   gfx::Rect UnoccludedSurfaceContentRect(const LayerType* layer,