Set user_gesture bit at NavigationHandle creation time.

content/browser/frame_host/navigator_impl.h

 // 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.
 
 #ifndef CONTENT_BROWSER_FRAME_HOST_NAVIGATOR_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATOR_IMPL_H_
 
 #include <memory>
 
 #include "base/containers/scoped_ptr_hash_map.h"
@@ skipping 23 matching lines @@
   NavigatorImpl(NavigationControllerImpl* navigation_controller,
                 NavigatorDelegate* delegate);
 
   static void CheckWebUIRendererDoesNotDisplayNormalURL(
       RenderFrameHostImpl* render_frame_host,
       const GURL& url);
 
   // Navigator implementation.
   NavigatorDelegate* GetDelegate() override;
   NavigationController* GetController() override;
-  void DidStartProvisionalLoad(
-      RenderFrameHostImpl* render_frame_host,
-      const GURL& url,
-      const base::TimeTicks& navigation_start) override;
+  void DidStartProvisionalLoad(RenderFrameHostImpl* render_frame_host,
+                               const GURL& url,
+                               const base::TimeTicks& navigation_start,
+                               NavigationGesture gesture) override;
   void DidFailProvisionalLoadWithError(
       RenderFrameHostImpl* render_frame_host,
       const FrameHostMsg_DidFailProvisionalLoadWithError_Params& params)
       override;
   void DidFailLoadWithError(RenderFrameHostImpl* render_frame_host,
                             const GURL& url,
                             int error_code,
                             const base::string16& error_description,
                             bool was_ignored_by_handler) override;
   void DidNavigate(
@@ skipping 99 matching lines @@
   NavigatorDelegate* delegate_;
 
   std::unique_ptr<NavigatorImpl::NavigationMetricsData> navigation_data_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigatorImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATOR_IMPL_H_