Remove search::GetSearchTerms since it always returns empty string

components/toolbar/toolbar_model_delegate.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 COMPONENTS_TOOLBAR_TOOLBAR_MODEL_DELEGATE_H_
 #define COMPONENTS_TOOLBAR_TOOLBAR_MODEL_DELEGATE_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
@@ skipping 22 matching lines @@
   virtual bool GetURL(GURL* url) const = 0;
 
   // Returns whether the URL for the current navigation entry should be
   // in the location bar.
   virtual bool ShouldDisplayURL() const = 0;
 
   // Returns the underlying security level of the page without regard to any
   // user edits that may be in progress.
   virtual SecurityLevel GetSecurityLevel() const = 0;
 
-  // Returns search terms as in search::GetSearchTerms() if such terms should
-  // appear in the omnibox (i.e. the page is sufficiently secure, search term
-  // replacement is enabled, editing is not in progress, etc.) given that the
-  // page has a security level of |security_level|.
-  virtual base::string16 GetSearchTerms(SecurityLevel security_level) const = 0;
-
   // Returns the certificate for the current navigation entry.
   virtual scoped_refptr<net::X509Certificate> GetCertificate() const = 0;
 
  protected:
   virtual ~ToolbarModelDelegate() {}
 };
 
 #endif  // COMPONENTS_TOOLBAR_TOOLBAR_MODEL_DELEGATE_H_