Fix utterly wrong comment that hasn't been true for years.

content/public/browser/navigation_controller.h

Index: content/public/browser/navigation_controller.h
diff --git a/content/public/browser/navigation_controller.h b/content/public/browser/navigation_controller.h
index 4829349e8930ebc4eb0eb4a4fe488833dcb57011..bfb9281dfabe218e8ea31d7d52fc1b10f8023f8f 100644
--- a/content/public/browser/navigation_controller.h
+++ b/content/public/browser/navigation_controller.h
@@ -27,8 +27,8 @@ struct Referrer;
 // A NavigationController maintains the back-forward list for a single tab and
 // manages all navigation within that list.
 //
-// The NavigationController also owns all WebContents for the tab. This is to
-// make sure that we have at most one WebContents instance per type.
+// Each NavigationController belongs to one WebContents; each WebContents has
+// exactly one NavigationController.
 class NavigationController {
  public:
   enum ReloadType {
@@ -55,7 +55,7 @@ class NavigationController {
   virtual ~NavigationController() {}
 
   // Returns the web contents associated with this controller. Non-NULL except
-  // during set-up of the tab.
+  // during set-up.

[jochen (gone - plz use gerrit), 2012/05/24 21:38:55]

is this true? I thought this is just implemented as return web_contents_ which
is initialized in NavigationControllerImpl's constructor

   virtual WebContents* GetWebContents() const = 0;
 
   // Get/set the browser context for this controller. It can never be NULL.