Mac Overlays: Allow SolidColor and Tile quads to be candidates for overlays.

cc/quads/tile_draw_quad.h

Index: cc/quads/tile_draw_quad.h
diff --git a/cc/quads/tile_draw_quad.h b/cc/quads/tile_draw_quad.h
index feb9e87c7cc1541a58bd235ada782bb75ea56e3f..d2206fd95fda4b68a9811c9c2e27dff60395ec25 100644
--- a/cc/quads/tile_draw_quad.h
+++ b/cc/quads/tile_draw_quad.h
@@ -25,7 +25,8 @@ class CC_EXPORT TileDrawQuad : public ContentDrawQuadBase {
               const gfx::RectF& tex_coord_rect,
               const gfx::Size& texture_size,
               bool swizzle_contents,
-              bool nearest_neighbor);
+              bool nearest_neighbor,
+              bool allow_overlay);
 
   void SetAll(const SharedQuadState* shared_quad_state,
               const gfx::Rect& rect,
@@ -39,7 +40,8 @@ class CC_EXPORT TileDrawQuad : public ContentDrawQuadBase {
               const gfx::RectF& tex_coord_rect,
               const gfx::Size& texture_size,
               bool swizzle_contents,
-              bool nearest_neighbor);
+              bool nearest_neighbor,
+              bool allow_overlay);
 
   static const TileDrawQuad* MaterialCast(const DrawQuad*);