add code to propagate finch config TranslateServerStudy server_params to translate element code

components/translate/core/browser/translate_script.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_TRANSLATE_CORE_BROWSER_TRANSLATE_SCRIPT_H_
 #define COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_SCRIPT_H_
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 
 namespace translate {
 
 class TranslateScriptTest;
 class TranslateURLFetcher;
 
 class TranslateScript {
  public:
   typedef base::Callback<void(bool, const std::string&)> RequestCallback;
 
   static const int kFetcherId = 0;
 
+  // Study name in finch config file for the server params.
+  static const char kTranslateServerStudy[];

[groby-ooo-7-16, 2016/08/02 21:14:10]

Please don't expose in the header - I think we can keep this private, correct?

[ftang, 2016/08/02 23:46:23]

Done.

+
+  // Param name in finch config file for the server params.
+  static const char kServerParams[];
+
   TranslateScript();
   virtual ~TranslateScript();
 
   // Returns the feched the translate script.
   const std::string& data() { return data_; }
 
   // Used by unit-tests to override some defaults:
   // Delay after which the translate script is fetched again from the
   // translation server.
   void set_expiration_delay(int delay_ms) {
@@ skipping 50 matching lines @@
   RequestCallbackList callback_list_;
 
   base::WeakPtrFactory<TranslateScript> weak_method_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TranslateScript);
 };
 
 }  // namespace translate
 
 #endif  // COMPONENTS_TRANSLATE_CORE_BROWSER_TRANSLATE_SCRIPT_H_