cc: Remove and Create the correct tiles when resizing live tiles rect

cc/base/tiling_data.h

Index: cc/base/tiling_data.h
diff --git a/cc/base/tiling_data.h b/cc/base/tiling_data.h
index 7cd9457095fac4c840c76f38ae20b3df021f205d..62d5178329bebd778caccfca873d92e3086f4fbe 100644
--- a/cc/base/tiling_data.h
+++ b/cc/base/tiling_data.h
@@ -103,14 +103,13 @@ class CC_EXPORT TilingData {
     int bottom_;
   };
 
-  // Iterate through all indices whose bounds + border intersect with
-  // |consider| but which also do not intersect with |ignore|.
+  // Iterate through all indices whose bounds (not including borders) intersect
+  // with |consider| but which also do not intersect with |ignore|.
   class CC_EXPORT DifferenceIterator : public BaseIterator {
    public:
-    DifferenceIterator(
-      const TilingData* tiling_data,
-      const gfx::Rect& consider_rect,
-      const gfx::Rect& ignore_rect);
+    DifferenceIterator(const TilingData* tiling_data,
+                       const gfx::Rect& consider_rect,
+                       const gfx::Rect& ignore_rect);
     DifferenceIterator& operator++();
 
    private: