Support window.opener after a process swap.

content/browser/renderer_host/render_view_host.h

Index: content/browser/renderer_host/render_view_host.h
diff --git a/content/browser/renderer_host/render_view_host.h b/content/browser/renderer_host/render_view_host.h
index 88dac2a54ecfcf1fee99703236f06d2d57f3fc81..64d8f7927f8b1f5afa2891677c723052a12673bc 100644
--- a/content/browser/renderer_host/render_view_host.h
+++ b/content/browser/renderer_host/render_view_host.h
@@ -162,26 +162,29 @@ class RenderViewHost : public RenderWidgetHost {
   void SetNavigationsSuspended(bool suspend);
 
   // Causes the renderer to invoke the onbeforeunload event handler.  The
-  // result will be returned via ViewMsg_ShouldClose. See also ClosePage which
-  // will fire the PageUnload event.
+  // result will be returned via ViewMsg_ShouldClose. See also ClosePage and
+  // SwapOut, which fire the PageUnload event.
   //
   // Set bool for_cross_site_transition when this close is just for the current
   // RenderView in the case of a cross-site transition. False means we're
   // closing the entire tab.
   void FirePageBeforeUnload(bool for_cross_site_transition);
 
+  // Tells the renderer that this RenderView is being swapped out for one in a
+  // different renderer process.  The renderer should preserve the Frame object
+  // until it exits (when it has no more active RenderViews).
+  //
+  // Please see ViewMsg_SwapOut_Params in view_messages.h for a description
+  // of the parameters.
+  void SwapOut(int new_render_process_host_id, int new_request_id);
+
+  // Called by ResourceDispatcherHost after the SwapOutACK is received.
+  void OnSwapOutACK();
+
   // Causes the renderer to close the current page, including running its
   // onunload event handler.  A ClosePage_ACK message will be sent to the
   // ResourceDispatcherHost when it is finished.
-  //
-  // Please see ViewMsg_ClosePage in resource_messages_internal.h for a
-  // description of the parameters.
-  void ClosePage(bool for_cross_site_transition,
-                 int new_render_process_host_id,
-                 int new_request_id);
-
-  // Called by ResourceDispatcherHost after the ClosePageACK is received.
-  void OnClosePageACK(bool for_cross_site_transition);
+  void ClosePage();
 
   // Close the page ignoring whether it has unload events registers.
   // This is called after the beforeunload and unload events have fired
@@ -584,6 +587,7 @@ class RenderViewHost : public RenderWidgetHost {
   void OnUpdateInspectorSetting(const std::string& key,
                                 const std::string& value);
   void OnMsgShouldCloseACK(bool proceed);
+  void OnMsgClosePageACK();
 
   void OnAccessibilityNotifications(
       const std::vector<ViewHostMsg_AccessibilityNotification_Params>& params);