Revise comments for the PageState property on NavigationEntry.

content/public/browser/navigation_entry.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_BROWSER_NAVIGATION_ENTRY_H_
 #define CONTENT_PUBLIC_BROWSER_NAVIGATION_ENTRY_H_
 
 #include <string>
 
 #include "base/memory/ref_counted_memory.h"
@@ skipping 58 matching lines @@
   virtual void SetVirtualURL(const GURL& url) = 0;
   virtual const GURL& GetVirtualURL() const = 0;
 
   // The title as set by the page. This will be empty if there is no title set.
   // The caller is responsible for detecting when there is no title and
   // displaying the appropriate "Untitled" label if this is being displayed to
   // the user.
   virtual void SetTitle(const string16& title) = 0;
   virtual const string16& GetTitle() const = 0;
 
-  // XXX
-  // Content state is an opaque blob created by WebKit that represents the
-  // state of the page. This includes form entries and scroll position for each
-  // frame. We store it so that we can supply it back to WebKit to restore form
-  // state properly when the user goes back and forward.
+  // Page state is an opaque blob created by Blink that represents the state of
+  // the page. This includes form entries and scroll position for each frame.
+  // We store it so that we can supply it back to Blink to restore form state
+  // properly when the user goes back and forward.
   //
-  // WARNING: This state is saved to the file and used to restore previous
-  // states. If the format is modified in the future, we should still be able to
-  // deal with older versions.
+  // NOTE: This state is saved to disk and used to restore previous states.  If
+  // the format is modified in the future, we should still be able to deal with
+  // older versions.
   virtual void SetPageState(const PageState& state) = 0;
   virtual const PageState& GetPageState() const = 0;
 
   // Describes the current page that the tab represents. This is the ID that the
   // renderer generated for the page and is how we can tell new versus
   // renavigations.
   virtual void SetPageID(int page_id) = 0;
   virtual int32 GetPageID() const = 0;
 
   // Page-related helpers ------------------------------------------------------
@@ skipping 108 matching lines @@
   //   - a response wasn't received;
   //   - or this navigation was restored and for some reason the
   //     status code wasn't available.
   virtual void SetHttpStatusCode(int http_status_code) = 0;
   virtual int GetHttpStatusCode() const = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_NAVIGATION_ENTRY_H_