Fix translate namespace

chrome/browser/ui/browser_content_translate_driver_observer.h

 // Copyright 2014 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_UI_BROWSER_CONTENT_TRANSLATE_DRIVER_OBSERVER_H_
 #define CHROME_BROWSER_UI_BROWSER_CONTENT_TRANSLATE_DRIVER_OBSERVER_H_
 
 #include "components/translate/content/browser/content_translate_driver.h"
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 
 class Browser;
 
 // Implementation of ContentTranslateDriver::Observer for Browser. This observes
 // wether Translate is enabled or not, and updates toolbar in response to
 // changes in state of translate.
 class BrowserContentTranslateDriverObserver
-    : public ContentTranslateDriver::Observer {
+    : public translate::ContentTranslateDriver::Observer {
  public:
   explicit BrowserContentTranslateDriverObserver(Browser* browser);
 
   virtual ~BrowserContentTranslateDriverObserver();
 
   // Overridden from ContentTranslateDriver::Observer
   virtual void OnIsPageTranslatedChanged(content::WebContents* source) OVERRIDE;
   virtual void OnTranslateEnabledChanged(content::WebContents* source) OVERRIDE;
 
  private:
   Browser* browser_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserContentTranslateDriverObserver);
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_CONTENT_TRANSLATE_DRIVER_OBSERVER_H_