webview: Fix the code to disallow external protocol handlers.

chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.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 "chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/download/download_request_limiter.h"
 #include "chrome/browser/download/download_resource_throttle.h"
 #include "chrome/browser/extensions/api/streams_private/streams_private_api.h"
 #include "chrome/browser/extensions/extension_info_map.h"
+#include "chrome/browser/extensions/extension_renderer_state.h"
 #include "chrome/browser/extensions/user_script_listener.h"
 #include "chrome/browser/external_protocol/external_protocol_handler.h"
 #include "chrome/browser/google/google_util.h"
 #include "chrome/browser/metrics/variations/variations_http_header_provider.h"
 #include "chrome/browser/net/resource_prefetch_predictor_observer.h"
 #include "chrome/browser/prerender/prerender_manager.h"
 #include "chrome/browser/prerender/prerender_tracker.h"
 #include "chrome/browser/prerender/prerender_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_io_data.h"
@@ skipping 386 matching lines @@
 #else
 
   if (prerender_tracker_->IsPrerenderingOnIOThread(child_id, route_id)) {
     ReportPrerenderSchemeCancelReason(
         PRERENDER_SCHEME_CANCEL_REASON_EXTERNAL_PROTOCOL);
     prerender_tracker_->TryCancel(
         child_id, route_id, prerender::FINAL_STATUS_UNSUPPORTED_SCHEME);
     return false;
   }
 
-  RenderViewHost* view = RenderViewHost::FromID(child_id, route_id);
-  if (view && view->GetProcess()->IsGuest())
+  ExtensionRendererState::WebViewInfo info;
+  if (ExtensionRendererState::GetInstance()->GetWebViewInfo(child_id,
+                                                            route_id,
+                                                            &info)) {
     return false;
+  }
 
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       base::Bind(&ExternalProtocolHandler::LaunchUrl, url, child_id, route_id));
   return true;
 #endif
 }
 
 void ChromeResourceDispatcherHostDelegate::AppendStandardResourceThrottles(
     net::URLRequest* request,
@@ skipping 199 matching lines @@
   if (!prerender::PrerenderManager::DoesURLHaveValidScheme(redirect_url) &&
       ResourceRequestInfo::ForRequest(request)->GetAssociatedRenderView(
           &child_id, &route_id) &&
       prerender_tracker_->IsPrerenderingOnIOThread(child_id, route_id)) {
     ReportUnsupportedPrerenderScheme(redirect_url);
     prerender_tracker_->TryCancel(
         child_id, route_id, prerender::FINAL_STATUS_UNSUPPORTED_SCHEME);
     request->Cancel();
   }
 }