[page_load_metrics] Get navigation_start from NavigationHandle

content/browser/frame_host/navigation_handle_impl.h

 // 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.
 
 #ifndef CONTENT_BROWSER_FRAME_HOST_NAVIGATION_HANDLE_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATION_HANDLE_IMPL_H_
 
 #include "content/public/browser/navigation_handle.h"
 
 #include "base/callback.h"
@@ skipping 52 matching lines @@
   // associated with this navigation.
   static scoped_ptr<NavigationHandleImpl> Create(
       const GURL& url,
       FrameTreeNode* frame_tree_node,
       const base::TimeTicks& navigation_start);
   ~NavigationHandleImpl() override;
 
   // NavigationHandle implementation:
   const GURL& GetURL() override;
   bool IsInMainFrame() override;
+  const base::TimeTicks& NavigationStart() override;
   bool IsPost() override;
   const Referrer& GetReferrer() override;
   bool HasUserGesture() override;
   ui::PageTransition GetPageTransition() override;
   bool IsExternalProtocol() override;
   net::Error GetNetErrorCode() override;
   RenderFrameHostImpl* GetRenderFrameHost() override;
   bool IsSamePage() override;
   bool HasCommitted() override;
   bool IsErrorPage() override;
   void Resume() override;
   void RegisterThrottleForTesting(
       scoped_ptr<NavigationThrottle> navigation_throttle) override;
   NavigationThrottle::ThrottleCheckResult CallWillStartRequestForTesting(
       bool is_post,
       const Referrer& sanitized_referrer,
       bool has_user_gesture,
       ui::PageTransition transition,
       bool is_external_protocol) override;
   NavigationThrottle::ThrottleCheckResult CallWillRedirectRequestForTesting(
       const GURL& new_url,
       bool new_method_is_post,
       const GURL& new_referrer_url,
       bool new_is_external_protocol) override;
 
-  // The time the navigation started, recorded either in the renderer or browser
-  // process. Corresponds to Navigation Timing API.
-  // TODO(csharrison): Add this to the public class and mark this override.
-  const base::TimeTicks& navigation_start() { return navigation_start_; }
-
   NavigatorDelegate* GetDelegate() const;
 
   void set_net_error_code(net::Error net_error_code) {
     net_error_code_ = net_error_code;
   }
 
   // Returns whether the navigation is currently being transferred from one
   // RenderFrameHost to another. In particular, a DidStartProvisionalLoad IPC
   // for the navigation URL, received in the new RenderFrameHost, should not
   // indicate the start of a new navigation in that case.
@@ skipping 105 matching lines @@
   // Manages the lifetime of a pre-created ServiceWorkerProviderHost until a
   // corresponding ServiceWorkerNetworkProvider is created in the renderer.
   scoped_ptr<ServiceWorkerNavigationHandle> service_worker_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationHandleImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATION_HANDLE_IMPL_H_