Replace more ObserverList with base::ObserverList.

extensions/browser/script_executor.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 EXTENSIONS_BROWSER_SCRIPT_EXECUTOR_H_
 #define EXTENSIONS_BROWSER_SCRIPT_EXECUTOR_H_
 
 #include "base/callback_forward.h"
 #include "base/observer_list.h"
 #include "extensions/common/user_script.h"
@@ skipping 14 matching lines @@
 
 // Interface for executing extension content scripts (e.g. executeScript) as
 // described by the ExtensionMsg_ExecuteCode_Params IPC, and notifying the
 // caller when responded with ExtensionHostMsg_ExecuteCodeFinished.
 class ScriptExecutor {
  public:
   ScriptExecutor(
       content::WebContents* web_contents,
       // |script_observers| is assumed to be owned by |this|'s owner, and in
       // such a way that |this| is destroyed first.
-      ObserverList<ScriptExecutionObserver>* script_observers);
+      base::ObserverList<ScriptExecutionObserver>* script_observers);
 
   ~ScriptExecutor();
 
   // The type of script being injected.
   enum ScriptType {
     JAVASCRIPT,
     CSS,
   };
 
   // The scope of the script injection across the frames.
@@ skipping 52 matching lines @@
                      bool user_gesture,
                      ResultType result_type,
                      const ExecuteScriptCallback& callback);
 
  private:
   // The next value to use for request_id in ExtensionMsg_ExecuteCode_Params.
   int next_request_id_;
 
   content::WebContents* web_contents_;
 
-  ObserverList<ScriptExecutionObserver>* script_observers_;
+  base::ObserverList<ScriptExecutionObserver>* script_observers_;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_SCRIPT_EXECUTOR_H_