Support window.opener after a process swap.

content/renderer/render_view.h

Index: content/renderer/render_view.h
diff --git a/content/renderer/render_view.h b/content/renderer/render_view.h
index 4cdf0e2769516822d9aed31b396a7841702c30e3..8f3608c11300633b6858d1291f3dc8ed8c3e0538 100644
--- a/content/renderer/render_view.h
+++ b/content/renderer/render_view.h
@@ -71,7 +71,7 @@ class WebUIBindings;
 struct ContextMenuMediaParams;
 struct PP_Flash_NetAddress;
 struct ViewHostMsg_RunFileChooser_Params;
-struct ViewMsg_ClosePage_Params;
+struct ViewMsg_SwapOut_Params;
 struct ViewMsg_Navigate_Params;
 struct ViewMsg_StopFinding_Params;
 struct WebDropData;
@@ -693,6 +693,10 @@ class RenderView : public RenderWidget,
   // Send queued accessibility notifications from the renderer to the browser.
   void SendPendingAccessibilityNotifications();
 
+  // Allows certain IPC messages to be sent while swapped out, in case they
+  // are needed to keep the browser and renderer in a consistent state.
+  virtual bool CanSendWhileSwappedOut(IPC::Message* message);
+
   // IPC message handlers ------------------------------------------------------
   //
   // The documentation for these functions should be in
@@ -710,7 +714,7 @@ class RenderView : public RenderWidget,
                                    IPC::ChannelHandle handle);
   void OnCancelDownload(int32 download_id);
   void OnClearFocusedNode();
-  void OnClosePage(const ViewMsg_ClosePage_Params& params);
+  void OnClosePage();
 #if defined(ENABLE_FLAPPER_HACKS)
   void OnConnectTcpACK(int request_id,
                        IPC::PlatformFileForTransit socket_for_transit,
@@ -796,6 +800,7 @@ class RenderView : public RenderWidget,
   void OnShouldClose();
   void OnStop();
   void OnStopFinding(const ViewMsg_StopFinding_Params& params);
+  void OnSwapOut(const ViewMsg_SwapOut_Params& params);
   void OnThemeChanged();
   void OnUndo();
   void OnUpdateTargetURLAck();