make NavigationGesture part of public content API and use it outside content

content/public/browser/navigation_handle.cc

 // Copyright 2015 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/public/browser/navigation_handle.h"
 
 #include <utility>
 
 #include "content/browser/frame_host/navigation_handle_impl.h"
 #include "content/browser/frame_host/navigator.h"
 #include "content/browser/frame_host/render_frame_host_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 
 namespace content {
 
 WebContents* NavigationHandle::GetWebContents() {
   // The NavigationHandleImpl cannot access the WebContentsImpl as it would be
   // a layering violation, hence the cast here.
   return static_cast<WebContentsImpl*>(
       static_cast<NavigationHandleImpl*>(this)->GetDelegate());
 }
 
 // static
 std::unique_ptr<NavigationHandle>
 NavigationHandle::CreateNavigationHandleForTesting(
     const GURL& url,
     RenderFrameHost* render_frame_host,
     bool committed,
     net::Error error,
-    bool has_user_gesture) {
+    NavigationGesture gesture) {
   std::unique_ptr<NavigationHandleImpl> handle_impl =
       NavigationHandleImpl::Create(
           url, static_cast<RenderFrameHostImpl*>(render_frame_host)
                    ->frame_tree_node(),
           true,   // is_renderer_initiated
           false,  // is_same_page
           false,  // is_srcdoc
-          base::TimeTicks::Now(), 0,
-          has_user_gesture ? NavigationGestureUser : NavigationGestureAuto,
+          base::TimeTicks::Now(), 0, gesture,
           false);  // started_from_context_menu
   handle_impl->set_render_frame_host(
       static_cast<RenderFrameHostImpl*>(render_frame_host));
   if (error != net::OK)
     handle_impl->set_net_error_code(error);
   if (committed)
     handle_impl->CallDidCommitNavigationForTesting(url);
   return std::unique_ptr<NavigationHandle>(std::move(handle_impl));
 }
 
 }  // namespace content