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

chrome/browser/supervised_user/experimental/supervised_user_async_url_checker.h

Index: chrome/browser/supervised_user/experimental/supervised_user_async_url_checker.h
diff --git a/chrome/browser/supervised_user/experimental/supervised_user_async_url_checker.h b/chrome/browser/supervised_user/experimental/supervised_user_async_url_checker.h
index f38b3c9160538eb89e8c480122cd817debf8fa40..ee8132fa544179a7adc848f4333a2063bd53716b 100644
--- a/chrome/browser/supervised_user/experimental/supervised_user_async_url_checker.h
+++ b/chrome/browser/supervised_user/experimental/supervised_user_async_url_checker.h
@@ -32,9 +32,11 @@
       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();
 
@@ -50,11 +52,14 @@
     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_;