(DEPRECATED) Send navigation_start to browser process in DidStartProvisionalLoad

content/browser/frame_host/navigation_request.h

 // Copyright 2014 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_REQUEST_H_
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATION_REQUEST_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 110 matching lines @@
     DCHECK(state_ == NOT_STARTED);
     state_ = WAITING_FOR_RENDERER_RESPONSE;
   }
 
   NavigationHandleImpl* navigation_handle() const {
     return navigation_handle_.get();
   }
 
   // Creates a NavigationHandle. This should be called after any previous
   // NavigationRequest for the FrameTreeNode has been destroyed.
-  void CreateNavigationHandle();
+  void CreateNavigationHandle(double navigation_start);

[clamy, 2015/10/28 12:40:01]

There is no need to pass the navigation_start as a parameter since you store all
the NavigationParams which have the relevant information.

 
   // Transfers the ownership of the NavigationHandle to |render_frame_host|.
   // This should be called when the navigation is ready to commit, because the
   // NavigationHandle outlives the NavigationRequest. The NavigationHandle's
   // lifetime is the entire navigation, while the NavigationRequest is
   // destroyed when a navigation is ready for commit.
   void TransferNavigationHandleOwnership(
       RenderFrameHostImpl* render_frame_host);
 
  private:
@@ skipping 55 matching lines @@
   int bindings_;
 
   scoped_ptr<NavigationHandleImpl> navigation_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationRequest);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATION_REQUEST_H_