Change policy to not trigger dangerous download UI for web intents dispatched files.

content/browser/web_contents/render_view_host_manager.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.
 
 #include "content/browser/web_contents/render_view_host_manager.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 38 matching lines @@
       render_widget_delegate_(render_widget_delegate),
       render_view_host_(NULL),
       pending_render_view_host_(NULL),
       interstitial_page_(NULL) {
 }
 
 RenderViewHostManager::~RenderViewHostManager() {
   if (pending_render_view_host_)
     CancelPending();
 
-  // We should always have a main RenderViewHost.
+  // We should always have a main RenderViewHost except in some tests.
   RenderViewHostImpl* render_view_host = render_view_host_;
   render_view_host_ = NULL;
-  render_view_host->Shutdown();
+  if (render_view_host)
+    render_view_host->Shutdown();
 
   // Shut down any swapped out RenderViewHosts.
   for (RenderViewHostMap::iterator iter = swapped_out_hosts_.begin();
        iter != swapped_out_hosts_.end();
        ++iter) {
     iter->second->Shutdown();
   }
 }
 
 void RenderViewHostManager::Init(content::BrowserContext* browser_context,
@@ skipping 886 matching lines @@
 }
 
 RenderViewHostImpl* RenderViewHostManager::GetSwappedOutRenderViewHost(
     SiteInstance* instance) {
   RenderViewHostMap::iterator iter = swapped_out_hosts_.find(instance->GetId());
   if (iter != swapped_out_hosts_.end())
     return iter->second;
 
   return NULL;
 }