PageLoadMetrics renderer and browser implementation.

content/browser/frame_host/navigation_handle_impl.h

Index: content/browser/frame_host/navigation_handle_impl.h
diff --git a/content/browser/frame_host/navigation_handle_impl.h b/content/browser/frame_host/navigation_handle_impl.h
index 33e51ddab278cf281b89fe998d32159acc2210b0..9773c99595af0e5b6fff43614b6035132fc1b779 100644
--- a/content/browser/frame_host/navigation_handle_impl.h
+++ b/content/browser/frame_host/navigation_handle_impl.h
@@ -62,6 +62,7 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
   const GURL& GetURL() const override;
   net::Error GetNetErrorCode() const override;
   bool IsInMainFrame() const override;
+  bool IsSamePage() const override;
   bool HasCommittedDocument() const override;
   bool HasCommittedErrorPage() const override;
 
@@ -84,7 +85,7 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
 
   // Called when the navigation was committed. This will update the |state_|
   // and inform the delegate,
-  void DidCommitNavigation();
+  void DidCommitNavigation(bool same_page);
 
  private:
   // Used to track the state the navigation is currently in.
@@ -104,6 +105,9 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
   State state_;
   const bool is_main_frame_;
 
+  // Whether the navigation happened in the same page.

[clamy, 2015/09/11 11:52:32]

nit: you can just group this parameter with the ones above (NavigationHandle
header provides description for those ones).

[Charlie Harrison, 2015/09/11 14:40:52]

Done.

+  bool is_same_page_;
+
   // Whether the navigation is in the middle of a transfer. Set to false when
   // the DidStartProvisionalLoad is received from the new renderer.
   bool is_transferring_;