Cleanup: Remove some std::map::operator[] usage in ApiResourceManager.

extensions/browser/api/cast_channel/cast_channel_api.cc

 // 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.
 
 #include "extensions/browser/api/cast_channel/cast_channel_api.h"
 
 #include <limits>
 #include <string>
 
 #include "base/json/json_writer.h"
+#include "base/lazy_instance.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/time/default_tick_clock.h"
 #include "base/values.h"
 #include "content/public/browser/browser_thread.h"
 #include "extensions/browser/api/cast_channel/cast_socket.h"
 #include "extensions/browser/api/cast_channel/logger.h"
 #include "extensions/browser/api/cast_channel/logging.pb.h"
 #include "extensions/browser/event_router.h"
 #include "net/base/ip_endpoint.h"
@@ skipping 481 matching lines @@
   } else {
     SetError("Unable to get logs.");
   }
 
   api_->GetLogger()->Reset();
 
   AsyncWorkCompleted();
 }
 
 }  // namespace extensions