cc: Rename visible_content_rect and content stuff on quads.

cc/layers/draw_properties.h

Index: cc/layers/draw_properties.h
diff --git a/cc/layers/draw_properties.h b/cc/layers/draw_properties.h
index 8a37179c9d88c601d58285bf365d4dc03cd018bc..b5ac389312cc1152d4540288558dfec379cdbc37 100644
--- a/cc/layers/draw_properties.h
+++ b/cc/layers/draw_properties.h
@@ -81,8 +81,9 @@ struct CC_EXPORT DrawProperties {
   // ancestor of this layer.
   LayerType* render_target;
 
-  // This rect is in the layer's content space.
-  gfx::Rect visible_content_rect;
+  // This rect is a bounding box around what part of the layer is visible, in
+  // the layer's coordinate space.
+  gfx::Rect visible_layer_rect;
 
   // In target surface space, the rect that encloses the clipped, drawable
   // content of the layer.