Move GoogleImageSearchSource() from template_url.cc to UIThreadSearchTermsData

components/search_engines/search_terms_data.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 COMPONENTS_SEARCH_ENGINES_SEARCH_TERMS_DATA_H_
 #define COMPONENTS_SEARCH_ENGINES_SEARCH_TERMS_DATA_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 38 matching lines @@
   // This implementation returns the empty string.
   virtual std::string GetSuggestRequestIdentifier() const;
 
   // Returns a string indicating whether a non-default theme is active,
   // suitable for adding as a query string param to the homepage.  This only
   // applies if Instant Extended is enabled.  Returns an empty string otherwise.
   // Determining this requires accessing the Profile, so this can only ever be
   // non-empty for UIThreadSearchTermsData.
   virtual std::string NTPIsThemedParam() const;
 
+  // Returns the value to use for replacements of type
+  // GOOGLE_IMAGE_SEARCH_SOURCE.
+  virtual std::string GoogleImageSearchSource() const;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(SearchTermsData);
 };
 
 #endif  // COMPONENTS_SEARCH_ENGINES_SEARCH_TERMS_DATA_H_