Remove most remaining references to IntRect and FloatRect.

cc/layer_tiling_data.cc

Index: cc/layer_tiling_data.cc
diff --git a/cc/layer_tiling_data.cc b/cc/layer_tiling_data.cc
index b3ba58d6b0a3be4b44e587e45c2f306bd9410a9a..10086da3a4fd4bf34c9d3a20b187050d6a06359c 100644
--- a/cc/layer_tiling_data.cc
+++ b/cc/layer_tiling_data.cc
@@ -7,6 +7,8 @@
 
 #include "cc/layer_tiling_data.h"
 
+#include "IntRect.h"
+#include "IntSize.h"
 #include "base/logging.h"
 
 using namespace std;
@@ -117,7 +119,7 @@ Region LayerTilingData::opaqueRegionInContentRect(const gfx::Rect& contentRect)
                 continue;
 
             gfx::Rect tileOpaqueRect = gfx::IntersectRects(contentRect, tile->opaqueRect());
-            opaqueRegion.unite(cc::IntRect(tileOpaqueRect));
+            opaqueRegion.Union(tileOpaqueRect);
         }
     }
     return opaqueRegion;