Add page load metrics for no-store forward back navigations.

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 <stddef.h>
@@ skipping 80 matching lines @@
   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;
+  const net::HttpResponseHeaders* GetResponseHeaders() override;
   void Resume() override;
   void CancelDeferredNavigation(
       NavigationThrottle::ThrottleCheckResult result) override;
   void RegisterThrottleForTesting(
       std::unique_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;
   NavigationThrottle::ThrottleCheckResult CallWillProcessResponseForTesting(
       RenderFrameHost* render_frame_host) override;
 
   NavigationData* GetNavigationData() override;
 
   NavigatorDelegate* GetDelegate() const;
 
   RequestContextType GetRequestContextType() const;
 
-  // Returns the response headers for the request or nullptr if there are none.
-  // This should only be accessed after a redirect was encountered or after the
-  // navigation is ready to commit. The headers returned should not be modified,
-  // as modifications will not be reflected in the network stack.
-  const net::HttpResponseHeaders* GetResponseHeaders();
-
   // Get the unique id from the NavigationEntry associated with this
   // NavigationHandle. Note that a synchronous, renderer-initiated navigation
   // will not have a NavigationEntry associated with it, and this will return 0.
   int pending_nav_entry_id() const { return pending_nav_entry_id_; }
 
   // Changes the pending NavigationEntry ID for this handle.  This is currently
   // required during transfer navigations.
   // TODO(creis): Remove this when transfer navigations do not require pending
   // entries.  See https://crbug.com/495161.
   void update_entry_id_for_transfer(int nav_entry_id) {
@@ skipping 181 matching lines @@
 
   // Embedder data tied to this navigation.
   std::unique_ptr<NavigationData> navigation_data_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationHandleImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATION_HANDLE_IMPL_H_