Don't allow a renderer to exit if we are using it in other views.

content/browser/renderer_host/render_process_host_impl.cc

 // Copyright (c) 2012 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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #if defined(OS_WIN)
@@ skipping 1232 matching lines @@
     iter.Advance();
   }
 
   ClearTransportDIBCache();
 
   // this object is not deleted at this point and may be reused later.
   // TODO(darin): clean this up
 }
 
 void RenderProcessHostImpl::OnShutdownRequest() {
-  // Don't shutdown if there are pending RenderViews being swapped back in.
-  if (pending_views_)
+  // Don't shut down if there are more RenderViews than the one asking to
+  // close, or if there are pending RenderViews being swapped back in.
+  if (pending_views_ || render_widget_hosts_.size() > 1)
     return;
 
   // Notify any tabs that might have swapped out renderers from this process.
   // They should not attempt to swap them back in.
   content::NotificationService::current()->Notify(
       content::NOTIFICATION_RENDERER_PROCESS_CLOSING,
       content::Source<RenderProcessHost>(this),
       content::NotificationService::NoDetails());
 
   Send(new ChildProcessMsg_Shutdown());
@@ skipping 72 matching lines @@
 void RenderProcessHostImpl::OnRevealFolderInOS(const FilePath& path) {
   // Only honor the request if appropriate persmissions are granted.
   if (ChildProcessSecurityPolicyImpl::GetInstance()->CanReadFile(GetID(),
                                                                  path))
     content::GetContentClient()->browser()->OpenItem(path);
 }
 
 void RenderProcessHostImpl::OnSavedPageAsMHTML(int job_id, int64 data_size) {
   MHTMLGenerationManager::GetInstance()->MHTMLGenerated(job_id, data_size);
 }