Clean comments, namespace, and variable names

This CL removes TODOs and email addresses from comments, unifies some
namespaces and cleans a few variable names.  It is a copy of multiple
CLs on the widevine side.

Change-Id: I1bb649096476a5001a56d746427399de6a88ff69

libwvdrmengine/cdm/core/include/timer.h

@@ -2,8 +2,8 @@
 //
 // Timer - Platform independent interface for a Timer class
 //
-#ifndef CDM_BASE_TIMER_H_
-#define CDM_BASE_TIMER_H_
+#ifndef WVCDM_CORE_TIMER_H_
+#define WVCDM_CORE_TIMER_H_
 
 #include "wv_cdm_types.h"
 
@@ -48,4 +48,4 @@ class Timer {
 
 };  // namespace wvcdm
 
-#endif  // CDM_BASE_TIMER_H_
+#endif  // WVCDM_CORE_TIMER_H_