Send navigation_start to the browser in DidStartProvisionalLoad IPC

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 39 matching lines @@
 // NavigationRequest. It is then owned by the NavigationRequest until the
 // navigation is ready to commit. The NavigationHandleImpl ownership is then
 // transferred to the RenderFrameHost in which the navigation will commit.
 //
 // When PlzNavigate is enabled, the NavigationHandleImpl will never be reset
 // following the receipt of a DidStartProvisionalLoad IPC. There are also no
 // transferring navigations. The other causes of NavigationHandleImpl reset in
 // the RenderFrameHost still apply.
 class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
  public:
+  // |navigation_start| comes from the DidStartProvisionalLoad IPC, which tracks
+  // both renderer-initiated and browser-initiated navigation start.
+  // PlzNavigate: This value always comes from the CommonNavigationParams
+  // associated with this navigation.
   static scoped_ptr<NavigationHandleImpl> Create(
       const GURL& url,
-      FrameTreeNode* frame_tree_node);
+      FrameTreeNode* frame_tree_node,
+      const base::TimeTicks& navigation_start);
   ~NavigationHandleImpl() override;
 
   // NavigationHandle implementation:
   const GURL& GetURL() override;
   bool IsInMainFrame() override;
   bool IsPost() override;
   const Referrer& GetReferrer() override;
   bool HasUserGesture() override;
   ui::PageTransition GetPageTransition() override;
   bool IsExternalProtocol() override;
@@ skipping 10 matching lines @@
       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 Standard.

[nasko, 2015/11/13 21:52:54]

nit: Drop "Standard".

[Charlie Harrison, 2015/11/14 00:25:00]

Done.

+  // TODO(csharrison) add this to the public class and mark this override.

[nasko, 2015/11/13 21:52:54]

nit: Missing ":" after ). Also, start the comment with capital letter, as it is
a sentence.

[Charlie Harrison, 2015/11/14 00:25:00]

Done.

+  const base::TimeTicks& GetNavigationStart();
+
   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 52 matching lines @@
     WILL_SEND_REQUEST,
     DEFERRING_START,
     WILL_REDIRECT_REQUEST,
     DEFERRING_REDIRECT,
     READY_TO_COMMIT,
     DID_COMMIT,
     DID_COMMIT_ERROR_PAGE,
   };
 
   NavigationHandleImpl(const GURL& url,
-                       FrameTreeNode* frame_tree_node);
+                       FrameTreeNode* frame_tree_node,
+                       const base::TimeTicks& navigation_start);
 
   NavigationThrottle::ThrottleCheckResult CheckWillStartRequest();
   NavigationThrottle::ThrottleCheckResult CheckWillRedirectRequest();
 
   // Used in tests.
   State state() const { return state_; }
 
   // See NavigationHandle for a description of those member variables.
   GURL url_;
   bool is_post_;
@@ skipping 14 matching lines @@
 
   // The FrameTreeNode this navigation is happening in.
   FrameTreeNode* frame_tree_node_;
 
   // A list of Throttles registered for this navigation.
   ScopedVector<NavigationThrottle> throttles_;
 
   // The index of the next throttle to check.
   size_t next_index_;
 
+  // The time this navigation started.
+  const base::TimeTicks navigation_start_;
+
   // This callback will be run when all throttle checks have been performed.
   ThrottleChecksFinishedCallback complete_callback_;
 
   // PlzNavigate
   // 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_