Make classes and structures in core/paint fast-allocated.

Source/core/paint/NinePieceImageGrid.h

Index: Source/core/paint/NinePieceImageGrid.h
diff --git a/Source/core/paint/NinePieceImageGrid.h b/Source/core/paint/NinePieceImageGrid.h
index f96c190a10b56567313572f7cb81e86d14b8fd4e..7635484f4aa0e1b4470f547cfdca76a677265b3e 100644
--- a/Source/core/paint/NinePieceImageGrid.h
+++ b/Source/core/paint/NinePieceImageGrid.h
@@ -66,6 +66,7 @@ public:
         const IntRectOutsets& borderWidths);
 
     struct CORE_EXPORT NinePieceDrawInfo {
+        STACK_ALLOCATED();
         bool isDrawable;
         bool isCornerPiece;
         FloatRect destination;
@@ -81,6 +82,7 @@ public:
     NinePieceDrawInfo getNinePieceDrawInfo(NinePiece) const;
 
     struct Edge {
+        DISALLOW_ALLOCATION();
         bool isDrawable() const { return slice > 0 && width > 0; }
         float scale() const { return isDrawable() ? (float)width / slice : 1; }
         int slice;