1. Remove any references on other files from DebugTimer.c, to avoid un-used symbols linked.

2. Add GLOBAL_REMOVE_IF_UNREFERENCED for all global variables.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>






git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16298 6f19259b-4bc3-4df7-8a09-765794883524

SourceLevelDebugPkg/Library/DebugAgent/DebugAgentCommon/DebugTimer.h

@@ -1,7 +1,7 @@
 /** @file
   Header file for debug timer to support debug agent library implementation.
 
-  Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR>
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
   which accompanies this distribution.  The full text of the license may be found at
@@ -16,10 +16,11 @@
 #define _DEBUG_TIMER_H_
 
 /**
-  Initialize debug timer.
+  Initialize CPU local APIC timer.
 
+  @return   32-bit Local APIC timer init count.
 **/
-VOID
+UINT32
 InitializeDebugTimer (
   VOID
   );