Set user_gesture bit at NavigationHandle creation time.

content/browser/frame_host/interstitial_page_navigator_impl.cc

 // Copyright 2013 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/frame_host/interstitial_page_navigator_impl.h"
 
 #include "content/browser/frame_host/interstitial_page_impl.h"
 #include "content/browser/frame_host/navigation_controller_impl.h"
 #include "content/browser/frame_host/navigator_delegate.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
@@ skipping 12 matching lines @@
   return interstitial_;
 }
 
 NavigationController* InterstitialPageNavigatorImpl::GetController() {
   return controller_;
 }
 
 void InterstitialPageNavigatorImpl::DidStartProvisionalLoad(
     RenderFrameHostImpl* render_frame_host,
     const GURL& url,
-    const base::TimeTicks& navigation_start) {
+    const base::TimeTicks& navigation_start,
+    NavigationGesture gesture) {
   // The interstitial page should only navigate once.
   DCHECK(!render_frame_host->navigation_handle());
   render_frame_host->SetNavigationHandle(
       NavigationHandleImpl::Create(url, render_frame_host->frame_tree_node(),
                                    false,  // is_renderer_initiated
                                    false,  // is_synchronous
                                    false,  // is_srcdoc
                                    navigation_start,
-                                   0,      // pending_nav_entry_id
+                                   0,  // pending_nav_entry_id
+                                   gesture,
                                    false)  // started_in_context_menu
       );
 }
 
 void InterstitialPageNavigatorImpl::DidNavigate(
     RenderFrameHostImpl* render_frame_host,
     const FrameHostMsg_DidCommitProvisionalLoad_Params& input_params,
     std::unique_ptr<NavigationHandleImpl> navigation_handle) {
   navigation_handle->DidCommitNavigation(input_params, false,
                                          render_frame_host);
   navigation_handle.reset();
 
   // TODO(nasko): Move implementation here, but for the time being call out
   // to the interstitial page code.
   interstitial_->DidNavigate(render_frame_host->render_view_host(),
                              input_params);
 }
 
 }  // namespace content