Cleanup style nits in metrics daemon.

- Remove trailing spaces.
- Convert 'char *' to 'char*'
- Fix other minor style nits
- Many of these issues were pointed out by tfarina.

BUG=none
TEST=Checked that it compiles and passes tests.

Review URL: http://codereview.chromium.org/2693001
diff --git a/metrics/metrics_library.h b/metrics/metrics_library.h
index 8ae3f5b..a9ac0bb 100644
--- a/metrics/metrics_library.h
+++ b/metrics/metrics_library.h
@@ -75,9 +75,9 @@
   // message. The caller is responsible to store the \0 character
   // between NAME and VALUE (e.g. "%s%c%d", name, '\0', value).
   int32_t FormatChromeMessage(int32_t buffer_size, char* buffer,
-                              const char *format, ...);
+                              const char* format, ...);
 
   const char* uma_events_file_;
 };
 
-#endif /* METRICS_LIBRARY_H_ */
+#endif  // METRICS_LIBRARY_H_