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

cc/quads/content_draw_quad_base.h

Index: cc/quads/content_draw_quad_base.h
diff --git a/cc/quads/content_draw_quad_base.h b/cc/quads/content_draw_quad_base.h
index da8a472f008dc4d47638cdee0f682bc7b172eadc..f971fd66c8699290c987337309850b8d8d43efb3 100644
--- a/cc/quads/content_draw_quad_base.h
+++ b/cc/quads/content_draw_quad_base.h
@@ -27,7 +27,8 @@ class CC_EXPORT ContentDrawQuadBase : public DrawQuad {
               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,
               DrawQuad::Material material,
@@ -38,12 +39,14 @@ class CC_EXPORT ContentDrawQuadBase : public DrawQuad {
               const gfx::RectF& tex_coord_rect,
               const gfx::Size& texture_size,
               bool swizzle_contents,
-              bool nearest_neighbor);
+              bool nearest_neighbor,
+              bool allow_overlay);
 
   gfx::RectF tex_coord_rect;
   gfx::Size texture_size;
   bool swizzle_contents;
   bool nearest_neighbor;
+  bool allow_overlay;
 
  protected:
   ContentDrawQuadBase();