content: Use stl utilities from the base namespace

content/renderer/render_frame_impl.cc

 // Copyright 2013 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.
 
 #include "content/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 729 matching lines @@
         digests_of_uris_of_serialized_resources_(
             digests_of_uris_of_serialized_resources) {
     DCHECK(digests_of_uris_of_serialized_resources_);
   }
 
   bool shouldSkipResource(const WebURL& url) override {
     std::string digest =
         crypto::SHA256HashString(params_.salt + GURL(url).spec());
 
     // Skip if the |url| already covered by serialization of an *earlier* frame.
-    if (ContainsKey(params_.digests_of_uris_to_skip, digest))
+    if (base::ContainsKey(params_.digests_of_uris_to_skip, digest))
       return true;
 
     // Let's record |url| as being serialized for the *current* frame.
     auto pair = digests_of_uris_of_serialized_resources_->insert(digest);
     bool insertion_took_place = pair.second;
     DCHECK(insertion_took_place);  // Blink should dedupe within a frame.
 
     return false;
   }
 
@@ skipping 5554 matching lines @@
   // event target. Potentially a Pepper plugin will receive the event.
   // In order to tell whether a plugin gets the last mouse event and which it
   // is, we set |pepper_last_mouse_event_target_| to null here. If a plugin gets
   // the event, it will notify us via DidReceiveMouseEvent() and set itself as
   // |pepper_last_mouse_event_target_|.
   pepper_last_mouse_event_target_ = nullptr;
 #endif
 }
 
 }  // namespace content