Revert of OOPIF: Specify previous sibling frames when creating new RenderFrames.

content/renderer/render_frame_impl.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_RENDER_FRAME_IMPL_H_
 #define CONTENT_RENDERER_RENDER_FRAME_IMPL_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 112 matching lines @@
   // frame belongs to.
   // Callers *must* call |SetWebFrame| immediately after creation.
   // Note: This is called only when RenderFrame is created by Blink through
   // createChildFrame.
   // TODO(creis): We should structure this so that |SetWebFrame| isn't needed.
   static RenderFrameImpl* Create(RenderViewImpl* render_view, int32 routing_id);
 
   // Creates a new RenderFrame with |routing_id| as a child of the RenderFrame
   // identified by |parent_routing_id| or as the top-level frame if the latter
   // is MSG_ROUTING_NONE. If |proxy_routing_id| is MSG_ROUTING_NONE, it creates
-  // the Blink WebLocalFrame and inserts it into the frame tree after the frame
-  // identified by |previous_sibling_routing_id|, or as the first child if
-  // |previous_sibling_routing_id| is MSG_ROUTING_NONE. Otherwise, the frame is
-  // semi-orphaned until it commits, at which point it replaces the proxy
-  // identified by |proxy_routing_id|. Note: This is called only when
-  // RenderFrame is being created in response to IPC message from the browser
-  // process. All other frame creation is driven through Blink and Create.
+  // the Blink WebLocalFrame and inserts it in the proper place in the frame
+  // tree. Otherwise, the frame is semi-orphaned until it commits, at which
+  // point it replaces the proxy identified by |proxy_routing_id|.
+  // Note: This is called only when RenderFrame is being created in response to
+  // IPC message from the browser process. All other frame creation is driven
+  // through Blink and Create.
   static void CreateFrame(int routing_id,
                           int parent_routing_id,
-                          int previous_sibling_routing_id,
                           int proxy_routing_id,
                           const FrameReplicationState& replicated_state,
                           CompositorDependencies* compositor_deps,
                           const FrameMsg_NewFrame_WidgetParams& params);
 
   // Returns the RenderFrameImpl for the given routing ID.
   static RenderFrameImpl* FromRoutingID(int routing_id);
 
   // Just like RenderFrame::FromWebFrame but returns the implementation.
   static RenderFrameImpl* FromWebFrame(blink::WebFrame* web_frame);
@@ skipping 795 matching lines @@
 #endif
 
   base::WeakPtrFactory<RenderFrameImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_FRAME_IMPL_H_