Revert of Supervised user SafeSites: Expose & use API key from src-internal

chrome/browser/supervised_user/experimental/supervised_user_async_url_checker.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_SUPERVISED_USER_EXPERIMENTAL_SUPERVISED_USER_ASYNC_URL_CHECKER_H_
 #define CHROME_BROWSER_SUPERVISED_USER_EXPERIMENTAL_SUPERVISED_USER_ASYNC_URL_CHECKER_H_
 
 #include <string>
 
 #include "base/callback_forward.h"
@@ skipping 14 matching lines @@
 // supervised user, and returns the result asynchronously via a callback.
 class SupervisedUserAsyncURLChecker : net::URLFetcherDelegate {
  public:
   // Returns whether |url| should be blocked. Called from CheckURL.
   typedef base::Callback<void(const GURL&,
                               SupervisedUserURLFilter::FilteringBehavior,
                               bool /* uncertain */)>
       CheckCallback;
 
   SupervisedUserAsyncURLChecker(net::URLRequestContextGetter* context,
-                                const std::string& cx);
+                                const std::string& cx,
+                                const std::string& api_key);
   SupervisedUserAsyncURLChecker(net::URLRequestContextGetter* context,
                                 const std::string& cx,
+                                const std::string& api_key,
                                 size_t cache_size);
   virtual ~SupervisedUserAsyncURLChecker();
 
   // Returns whether |callback| was run synchronously.
   bool CheckURL(const GURL& url, const CheckCallback& callback);
 
  private:
   struct Check;
   struct CheckResult {
     CheckResult(SupervisedUserURLFilter::FilteringBehavior behavior,
                 bool uncertain);
     SupervisedUserURLFilter::FilteringBehavior behavior;
     bool uncertain;
   };
 
+  void SetApiKey(const std::string& api_key);
+
   // net::URLFetcherDelegate implementation.
   virtual void OnURLFetchComplete(const net::URLFetcher* source) override;
 
   net::URLRequestContextGetter* context_;
   std::string cx_;
+  std::string api_key_;
 
   ScopedVector<Check> checks_in_progress_;
 
   base::MRUCache<GURL, CheckResult> cache_;
 
   DISALLOW_COPY_AND_ASSIGN(SupervisedUserAsyncURLChecker);
 };
 
 #endif  // CHROME_BROWSER_SUPERVISED_USER_EXPERIMENTAL_SUPERVISED_USER_ASYNC_URL_CHECKER_H_