Clarify the documentation for loading_only on TabRenderer::UpdateData.

chrome/browser/views/tabs/tab_renderer.h

 // Copyright (c) 2006-2008 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 CHROME_BROWSER_VIEWS_TABS_TAB_RENDERER_H__
 #define CHROME_BROWSER_VIEWS_TABS_TAB_RENDERER_H__
 
 #include "base/gfx/point.h"
 #include "chrome/common/animation.h"
 #include "chrome/common/slide_animation.h"
@@ skipping 19 matching lines @@
   enum AnimationState {
     ANIMATION_NONE,
     ANIMATION_WAITING,
     ANIMATION_LOADING
   };
 
   TabRenderer();
   virtual ~TabRenderer();
 
   // Updates the data the Tab uses to render itself from the specified
-  // TabContents. If only the loading state was updated, the loading_only flag
-  // should be specified. If other things change, set this flag to false to 
-  // update everything.
+  // TabContents.
+  //
+  // See TabStripModel::TabChangedAt documentation for what loading_only means.
   void UpdateData(TabContents* contents, bool loading_only);
 
   // Updates the display to reflect the contents of this TabRenderer's model.
   void UpdateFromModel();
 
   // Returns true if the Tab is selected, false otherwise.
   virtual bool IsSelected() const;
 
   // Advance the Loading Animation to the next frame, or hide the animation if
   // the tab isn't loading.
@@ skipping 136 matching lines @@
 
   bool should_display_crashed_favicon_;
 
   static void InitClass();
   static bool initialized_;
 
   DISALLOW_EVIL_CONSTRUCTORS(TabRenderer);
 };
 
 #endif  // CHROME_BROWSER_VIEWS_TABS_TAB_RENDERER_H__