Make chrome::Navigate take in a Browser* that is never NULL. That function doesn't have a context, …

chrome/browser/extensions/extension_host.cc

Index: chrome/browser/extensions/extension_host.cc
===================================================================
--- chrome/browser/extensions/extension_host.cc	(revision 146579)
+++ chrome/browser/extensions/extension_host.cc	(working copy)
@@ -587,12 +587,9 @@
     }
   }
 
-  // Find a browser with a profile that matches the new tab. If none is found,
-  // NULL argument to NavigateParams is valid.
   Profile* profile =
       Profile::FromBrowserContext(new_contents->GetBrowserContext());
-  Browser* browser = browser::FindTabbedBrowser(
-      profile, false);  // Match incognito exactly.
+  Browser* browser = browser::FindOrCreateTabbedBrowser(profile);
   TabContents* tab_contents = new TabContents(new_contents);
   chrome::NavigateParams params(browser, tab_contents);
 
@@ -604,8 +601,6 @@
   if (disposition == NEW_POPUP)
     params.extension_app_id = extension_id_;
 
-  if (!browser)
-    params.profile = profile;
   params.disposition = disposition;
   params.window_bounds = initial_pos;
   params.window_action = chrome::NavigateParams::SHOW_WINDOW;