Convert chrome users of NavigationController::tab_contents() to use GetWebContents() instead.

BUG=98716
TBR=joi
Review URL: http://codereview.chromium.org/8986009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@116086 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/content/browser/tab_contents/navigation_controller.cc b/content/browser/tab_contents/navigation_controller.cc
index 280fe99..55e6ce3 100644
--- a/content/browser/tab_contents/navigation_controller.cc
+++ b/content/browser/tab_contents/navigation_controller.cc
@@ -35,6 +35,7 @@
 using content::NavigationEntry;
 using content::NavigationEntryImpl;
 using content::UserMetricsAction;
+using content::WebContents;
 
 namespace {
 
@@ -181,6 +182,10 @@
       content::NotificationService::NoDetails());
 }
 
+WebContents* NavigationController::GetWebContents() const {
+  return tab_contents_;
+}
+
 content::BrowserContext* NavigationController::GetBrowserContext() const {
   return browser_context_;
 }