Do not reset NavigationHandle when navigating same-page

content/browser/frame_host/interstitial_page_navigator_impl.h

Index: content/browser/frame_host/interstitial_page_navigator_impl.h
diff --git a/content/browser/frame_host/interstitial_page_navigator_impl.h b/content/browser/frame_host/interstitial_page_navigator_impl.h
index 9ef3bbf28b0f90f4f4ccc28edab07967b0adfe8d..92afa5f07889d14bacc5eb579b3dc2d6caa11d76 100644
--- a/content/browser/frame_host/interstitial_page_navigator_impl.h
+++ b/content/browser/frame_host/interstitial_page_navigator_impl.h
@@ -30,11 +30,10 @@ class CONTENT_EXPORT InterstitialPageNavigatorImpl : public Navigator {
       RenderFrameHostImpl* render_frame_host,
       const GURL& url,
       const base::TimeTicks& navigation_start) override;
-  void DidNavigate(RenderFrameHostImpl* render_frame_host,
-                   const FrameHostMsg_DidCommitProvisionalLoad_Params&
-                       input_params) override;
-  NavigationHandleImpl* GetNavigationHandleForFrameHost(
-      RenderFrameHostImpl* render_frame_host) override;
+  void DidNavigate(
+      RenderFrameHostImpl* render_frame_host,
+      const FrameHostMsg_DidCommitProvisionalLoad_Params& input_params,
+      std::unique_ptr<NavigationHandleImpl> navigation_handle) override;
 
  private:
   ~InterstitialPageNavigatorImpl() override;
@@ -46,15 +45,6 @@ class CONTENT_EXPORT InterstitialPageNavigatorImpl : public Navigator {
   // The NavigationController associated with this navigator.
   NavigationControllerImpl* controller_;
 
-  // The NavigationHandle associated with the interstitial navigation.
-  // Interstitials are assumed to only have a single RenderFrameHost, so it's ok
-  // to track the NavigationHandle here rather than per-frame.
-  //
-  // Note: this NavigationHandleImpl will not send DidStartNavigation or
-  // DidFinishNavigation events to the WebContentsObserver, since those will go
-  // through InterstitialPageImpl as the NavigatorDelegate and get dropped.
-  std::unique_ptr<NavigationHandleImpl> navigation_handle_;
-
   DISALLOW_COPY_AND_ASSIGN(InterstitialPageNavigatorImpl);
 };