This refactors 3 functions out of ShellCommandLib and puts them into a new library (but as 2 functions instead of 3). This allows for users outside of the shell itself to have access to these functions.

1) Remove the 3 functions out of the shell's internal library (ShellCommandLib)
2) Add a new library class (PathLib)
3) Add an instance of this class (BasePathLib)
4) Change all internal shell callers to use this new library class.

signed-off-by: jcarsey
reviewed-by: jljusten

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11936 6f19259b-4bc3-4df7-8a09-765794883524

ShellPkg/Library/UefiShellLevel1CommandsLib/If.c

@@ -14,6 +14,7 @@
 
 #include "UefiShellLevel1CommandsLib.h"
 #include <Library/PrintLib.h>
+#include <Library/PathLib.h>
 
 typedef enum {
   EndTagOr,
@@ -95,10 +96,7 @@ IsValidProfile (
   CONST CHAR16  *TempLocation;
 
   ProfilesString = ShellGetEnvironmentVariable(L"profiles");
-  //
-  // According to the Shell spec this is a required environment variable.
-  //
-  ASSERT(ProfileString != NULL);
+  ASSERT(ProfilesString != NULL);
   TempLocation = StrStr(ProfilesString, String);
   if ((TempLocation != NULL) && (*(TempLocation-1) == L';') && (*(TempLocation+StrLen(String)) == L';')) {
     return (TRUE);