Add support for SINGLETON_TAB disposition to BrowserNavigator....

chrome/browser/browser.h

Index: chrome/browser/browser.h
===================================================================
--- chrome/browser/browser.h	(revision 62194)
+++ chrome/browser/browser.h	(working copy)
@@ -625,6 +625,16 @@
   // not null.
   int GetLastBlockedCommand(WindowOpenDisposition* disposition);
 
+  // Called by browser::Navigate() when a navigation has occurred in a tab in
+  // this Browser. Updates the UI for the start of this navigation.
+  void UpdateUIForNavigationInTab(TabContents* contents,
+                                  PageTransition::Type transition,
+                                  bool user_initiated);
+
+  // Called by browser::Navigate() to retrieve the home page if no URL is
+  // specified.
+  virtual GURL GetHomePage() const;

[sky, 2010/10/12 17:44:19]

Does this needs to be virtual?

+
   // Interface implementations ////////////////////////////////////////////////
 
   // Overridden from PageNavigator:
@@ -639,6 +649,7 @@
   virtual void TabRestoreServiceChanged(TabRestoreService* service);
   virtual void TabRestoreServiceDestroyed(TabRestoreService* service);
 
+
   // Overridden from TabHandlerDelegate:
   virtual Profile* GetProfile() const;
   virtual Browser* AsBrowser();
@@ -913,10 +924,6 @@
                       int index,
                       int add_types);
 
-  // Returns what the user's home page is, or the new tab page if the home page
-  // has not been set.
-  GURL GetHomePage() const;
-
   // Shows the Find Bar, optionally selecting the next entry that matches the
   // existing search string for that Tab. |forward_direction| controls the
   // search direction.