Fix some GN component build issues.

components/device_event_log/device_event_log_impl.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 COMPONENTS_DEVICE_EVENT_LOG_DEVICE_EVENT_LOG_IMPL_H_
 #define COMPONENTS_DEVICE_EVENT_LOG_DEVICE_EVENT_LOG_IMPL_H_
 
 #include <list>
 #include <string>
 
 #include "base/time/time.h"
 #include "components/device_event_log/device_event_log.h"
-#include "components/device_event_log/device_event_log_export.h"
 
 namespace device_event_log {
 
-class DEVICE_EVENT_LOG_EXPORT DeviceEventLogImpl {
+class DeviceEventLogImpl {
  public:
   struct LogEntry {
     LogEntry(const char* filedesc,
              int file_line,
              LogType log_type,
              LogLevel log_level,
              const std::string& event);
 
     std::string file;
     int file_line;
@@ skipping 42 matching lines @@
 
   size_t max_entries_;
   LogEntryList entries_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceEventLogImpl);
 };
 
 }  // namespace device_event_log
 
 #endif  // COMPONENTS_DEVICE_EVENT_LOG_DEVICE_EVENT_LOG_IMPL_H_