Fix some chromium-style warnings in webrtc/tools/

BUG=163
R=phoglund@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/1908004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@4427 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/tools/simple_command_line_parser.h b/tools/simple_command_line_parser.h
index f791fe9..348e8c3 100644
--- a/tools/simple_command_line_parser.h
+++ b/tools/simple_command_line_parser.h
@@ -34,8 +34,8 @@
 
 class CommandLineParser {
  public:
-  CommandLineParser() {}
-  ~CommandLineParser() {}
+  CommandLineParser();
+  ~CommandLineParser();
 
   void Init(int argc, char** argv);