Revert of Pinch/Zoom Infrastructure & Plumbing CL

cc/layers/solid_color_scrollbar_layer_impl.h

Index: cc/layers/solid_color_scrollbar_layer_impl.h
diff --git a/cc/layers/solid_color_scrollbar_layer_impl.h b/cc/layers/solid_color_scrollbar_layer_impl.h
index 205496a6e72be02418bfea8356296c6aa3611e31..b725ed5b17cdf1fae1f08caeedd7a1d65ad3e764 100644
--- a/cc/layers/solid_color_scrollbar_layer_impl.h
+++ b/cc/layers/solid_color_scrollbar_layer_impl.h
@@ -17,8 +17,7 @@
       int id,
       ScrollbarOrientation orientation,
       int thumb_thickness,
-      bool is_left_side_vertical_scrollbar,
-      bool is_overlay);
+      bool is_left_side_vertical_scrollbar);
   virtual ~SolidColorScrollbarLayerImpl();
 
   // LayerImpl overrides.
@@ -35,8 +34,7 @@
                                int id,
                                ScrollbarOrientation orientation,
                                int thumb_thickness,
-                               bool is_left_side_vertical_scrollbar,
-                               bool is_overlay);
+                               bool is_left_side_vertical_scrollbar);
 
   // ScrollbarLayerImplBase implementation.
   virtual int ThumbThickness() const OVERRIDE;