Support window.opener after a process swap.

content/browser/renderer_host/render_process_host.h

Index: content/browser/renderer_host/render_process_host.h
diff --git a/content/browser/renderer_host/render_process_host.h b/content/browser/renderer_host/render_process_host.h
index a954d02adca29ba3b728738f7ea54321f78ebc88..e4c1860ba4f4580ddc522daaa92b7d9d8bc03525 100644
--- a/content/browser/renderer_host/render_process_host.h
+++ b/content/browser/renderer_host/render_process_host.h
@@ -18,7 +18,7 @@
 #include "ui/gfx/surface/transport_dib.h"
 
 class Profile;
-struct ViewMsg_ClosePage_Params;
+struct ViewMsg_SwapOut_Params;
 
 namespace base {
 class SharedMemory;
@@ -166,12 +166,12 @@ class RenderProcessHost : public IPC::Channel::Sender,
   // the specified render widget.
   virtual void CancelResourceRequests(int render_widget_id) = 0;
 
-  // Called on the UI thread to simulate a ClosePage_ACK message to the
+  // Called on the UI thread to simulate a SwapOut_ACK message to the
   // ResourceDispatcherHost.  Necessary for a cross-site request, in the case
   // that the original RenderViewHost is not live and thus cannot run an
-  // onunload handler.
-  virtual void CrossSiteClosePageACK(
-      const ViewMsg_ClosePage_Params& params) = 0;
+  // unload handler.
+  virtual void CrossSiteSwapOutACK(
+      const ViewMsg_SwapOut_Params& params) = 0;
 
   // Called on the UI thread to wait for the next UpdateRect message for the
   // specified render widget.  Returns true if successful, and the msg out-