Simplify RenderFrameImpl::ResolveOpener()

content/renderer/render_frame_proxy.h

Index: content/renderer/render_frame_proxy.h
diff --git a/content/renderer/render_frame_proxy.h b/content/renderer/render_frame_proxy.h
index 280bf3f7ad2ec1aa3ca635135f67d9e5e0fec168..e7f2e54377778a5168b6494f00e08e8c84972b70 100644
--- a/content/renderer/render_frame_proxy.h
+++ b/content/renderer/render_frame_proxy.h
@@ -77,10 +77,9 @@ class CONTENT_EXPORT RenderFrameProxy
   // for example, after a cross-process navigation or after the addition of a
   // new frame local to some other process. |routing_id| will be the ID of the
   // newly created RenderFrameProxy. |render_view_routing_id| identifies the
-  // RenderView to be associated with this frame.  |opener_routing_id|, if
-  // valid, is the routing ID of the new frame's opener.  |parent_routing_id|
-  // is the routing ID of the RenderFrameProxy to which the new frame is
-  // parented.
+  // RenderView to be associated with this frame.  |opener|, if supplied, is the
+  // new frame's opener.  |parent_routing_id| is the routing ID of the
+  // RenderFrameProxy to which the new frame is parented.
   //
   // |parent_routing_id| always identifies a RenderFrameProxy (never a
   // RenderFrame) because a new child of a local frame should always start out
@@ -88,7 +87,7 @@ class CONTENT_EXPORT RenderFrameProxy
   static RenderFrameProxy* CreateFrameProxy(
       int routing_id,
       int render_view_routing_id,
-      int opener_routing_id,
+      blink::WebFrame* opener,
       int parent_routing_id,
       const FrameReplicationState& replicated_state);