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 b9d5143eee5599431936ddac906a933a01c28f09..73e52bfbfb7f2eff1c91062318bf1a0c03af68c2 100644
--- a/content/renderer/render_view.h
+++ b/content/renderer/render_view.h
@@ -79,7 +79,7 @@ struct ContextMenuMediaParams;
 struct PP_Flash_NetAddress;
 struct ThumbnailScore;
 struct ViewHostMsg_RunFileChooser_Params;
-struct ViewMsg_ClosePage_Params;
+struct ViewMsg_SwapOut_Params;
 struct ViewMsg_Navigate_Params;
 struct ViewMsg_StopFinding_Params;
 struct WebApplicationInfo;
@@ -251,6 +251,9 @@ class RenderView : public RenderWidget,
   void AddObserver(RenderViewObserver* observer);
   void RemoveObserver(RenderViewObserver* observer);
 
+  // Swap this RenderView back in if the tab navigates back to this process.
+  void SwapIn();
+
   // Called from JavaScript window.external.AddSearchProvider() to add a
   // keyword for a provider described in the given OpenSearch document.
   void AddSearchProvider(const std::string& url,
@@ -758,7 +761,7 @@ class RenderView : public RenderWidget,
                          int message_id);
   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,
@@ -861,6 +864,7 @@ 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 OnUpdateBrowserWindowId(int window_id);
@@ -1094,6 +1098,11 @@ class RenderView : public RenderWidget,
   // True if the RenderView is currently prerendering a page.
   bool is_prerendering_;
 
+  // Whether this RenderView is currently swapped out, such that the tab is
+  // being rendered by another process.  If all RenderViews in a process are
+  // swapped out, the process can exit.
+  bool is_swapped_out_;
+
   // Page IDs ------------------------------------------------------------------
   //
   // Page IDs allow the browser to identify pages in each renderer process for