Pass the user_gesture context in the IPC message FrameMsg_CommitNavigation to the renderer.

content/browser/frame_host/render_frame_host_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_RENDER_FRAME_HOST_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 525 matching lines @@
   void DidCancelPopupMenu();
 #endif
 #endif
 
   // PlzNavigate: Indicates that a navigation is ready to commit and can be
   // handled by this RenderFrame.
   void CommitNavigation(ResourceResponse* response,
                         std::unique_ptr<StreamHandle> body,
                         const CommonNavigationParams& common_params,
                         const RequestNavigationParams& request_params,
-                        bool is_view_source);
+                        bool is_view_source,
+                        bool user_gesture);
 
   // PlzNavigate
   // Indicates that a navigation failed and that this RenderFrame should display
   // an error page.
   void FailedNavigation(const CommonNavigationParams& common_params,
                         const RequestNavigationParams& request_params,
                         bool has_stale_copy_in_cache,
                         int error_code);
 
   // Sets up the Mojo connection between this instance and its associated render
@@ skipping 509 matching lines @@
 
   // NOTE: This must be the last member.
   base::WeakPtrFactory<RenderFrameHostImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_