Eliminate redundancy in the parameters to NotifyEntryChanged.

BUG=369661
TEST=none

Review URL: https://codereview.chromium.org/1143333003

Cr-Commit-Position: refs/heads/master@{#330800}

chrome/browser/ui/browser.cc

@@ -1114,8 +1114,7 @@ void Browser::TabReplacedAt(TabStripModel* tab_strip_model,
   if (entry_count > 0) {
     // Send out notification so that observers are updated appropriately.
     new_contents->GetController().NotifyEntryChanged(
-        new_contents->GetController().GetEntryAtIndex(entry_count - 1),
-        entry_count - 1);
+        new_contents->GetController().GetEntryAtIndex(entry_count - 1));
   }
 
   if (session_service) {

content/browser/frame_host/navigation_controller_impl.cc

@@ -1910,11 +1910,12 @@ void NavigationControllerImpl::LoadIfNecessary() {
   NavigateToPendingEntry(NO_RELOAD);
 }
 
-void NavigationControllerImpl::NotifyEntryChanged(const NavigationEntry* entry,
-                                                  int index) {
+void NavigationControllerImpl::NotifyEntryChanged(
+    const NavigationEntry* entry) {
   EntryChangedDetails det;
   det.changed_entry = entry;
-  det.index = index;
+  det.index = GetIndexOfEntry(
+      NavigationEntryImpl::FromNavigationEntry(entry));
   NotificationService::current()->Notify(
       NOTIFICATION_NAV_ENTRY_CHANGED,
       Source<NavigationController>(this),

content/browser/frame_host/navigation_controller_impl.h

@@ -81,7 +81,7 @@ class CONTENT_EXPORT NavigationControllerImpl
   void Reload(bool check_for_repost) override;
   void ReloadIgnoringCache(bool check_for_repost) override;
   void ReloadOriginalRequestURL(bool check_for_repost) override;
-  void NotifyEntryChanged(const NavigationEntry* entry, int index) override;
+  void NotifyEntryChanged(const NavigationEntry* entry) override;
   void CopyStateFrom(const NavigationController& source) override;
   void CopyStateFromAndPrune(NavigationController* source,
                              bool replace_entry) override;

content/browser/frame_host/navigation_entry_impl.cc

@@ -51,6 +51,11 @@ NavigationEntryImpl* NavigationEntryImpl::FromNavigationEntry(
   return static_cast<NavigationEntryImpl*>(entry);
 }
 
+const NavigationEntryImpl* NavigationEntryImpl::FromNavigationEntry(
+    const NavigationEntry* entry) {
+  return static_cast<const NavigationEntryImpl*>(entry);
+}
+
 NavigationEntryImpl::NavigationEntryImpl()
     : NavigationEntryImpl(nullptr, -1, GURL(), Referrer(), base::string16(),
                           ui::PAGE_TRANSITION_LINK, false) {

content/browser/frame_host/navigation_entry_impl.h

@@ -50,6 +50,8 @@ class CONTENT_EXPORT NavigationEntryImpl
   };
 
   static NavigationEntryImpl* FromNavigationEntry(NavigationEntry* entry);
+  static const NavigationEntryImpl* FromNavigationEntry(
+      const NavigationEntry* entry);
 
   // The value of bindings() before it is set during commit.
   static int kInvalidBindings;

content/browser/web_contents/web_contents_impl.cc

@@ -3634,17 +3634,16 @@ void WebContentsImpl::UpdateState(RenderViewHost* rvh,
   // leaving a page, in which case our state may have already been moved to
   // the next page. The navigation controller will look up the appropriate
   // NavigationEntry and update it when it is notified via the delegate.
-
-  int entry_index = controller_.GetEntryIndexWithPageID(
+  NavigationEntryImpl* entry = controller_.GetEntryWithPageID(
       rvh->GetSiteInstance(), page_id);
-  if (entry_index < 0)
+
+  if (!entry)
     return;
-  NavigationEntry* entry = controller_.GetEntryAtIndex(entry_index);
 
   if (page_state == entry->GetPageState())
     return;  // Nothing to update.
   entry->SetPageState(page_state);
-  controller_.NotifyEntryChanged(entry, entry_index);
+  controller_.NotifyEntryChanged(entry);
 }
 
 void WebContentsImpl::UpdateTargetURL(RenderViewHost* render_view_host,

content/public/browser/navigation_controller.h

@@ -410,9 +410,8 @@ class NavigationController {
   virtual bool IsInitialNavigation() const = 0;
 
   // Broadcasts the NOTIFICATION_NAV_ENTRY_CHANGED notification for the given
-  // entry (which must be at the given index). This will keep things in sync
-  // like the saved session.
-  virtual void NotifyEntryChanged(const NavigationEntry* entry, int index) = 0;
+  // entry. This will keep things in sync like the saved session.
+  virtual void NotifyEntryChanged(const NavigationEntry* entry) = 0;
 
   // Copies the navigation state from the given controller to this one. This
   // one should be empty (just created).