Add flag to specify if explicitly requested download is from web.

content/browser/renderer_host/render_message_filter.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/renderer_host/render_message_filter.h"
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 705 matching lines @@
                                         const string16& suggested_name) {
   content::DownloadSaveInfo save_info;
   save_info.suggested_name = suggested_name;
   scoped_ptr<net::URLRequest> request(new net::URLRequest(url, NULL));
   request->set_referrer(referrer.url.spec());
   webkit_glue::ConfigureURLRequestForReferrerPolicy(
       request.get(), referrer.policy);
   download_stats::RecordDownloadSource(download_stats::INITIATED_BY_RENDERER);
   resource_dispatcher_host_->BeginDownload(
       request.Pass(),
+      true,  // is_content_initiated
       resource_context_,
       render_process_id_,
       message.routing_id(),
       false,
       save_info,
       ResourceDispatcherHostImpl::DownloadStartedCallback());
 }
 
 void RenderMessageFilter::OnCheckNotificationPermission(
     const GURL& source_origin, int* result) {
@@ skipping 214 matching lines @@
   // for a resize or if no backing store) the RenderWidgetHost is blocking the
   // UI thread for some time, waiting for an UpdateRect from the renderer. If we
   // are going to switch to accelerated compositing, the GPU process may need
   // round-trips to the UI thread before finishing the frame, causing deadlocks
   // if we delay the UpdateRect until we receive the OnSwapBuffersComplete. So
   // the renderer sent us this message, so that we can unblock the UI thread.
   // We will simply re-use the UpdateRect unblock mechanism, just with a
   // different message.
   render_widget_helper_->DidReceiveBackingStoreMsg(msg);
 }