Move string16 and char16 in to base::

compat/non_win/dbghelp.h

Index: compat/non_win/dbghelp.h
diff --git a/compat/non_win/dbghelp.h b/compat/non_win/dbghelp.h
index 0aadc8b5885454912aa5b799a8137e619cd0b6a7..21a58dc2cb9d4541e1541b4527c929be50cfae08 100644
--- a/compat/non_win/dbghelp.h
+++ b/compat/non_win/dbghelp.h
@@ -134,7 +134,7 @@ struct __attribute__((packed, aligned(4))) MINIDUMP_STRING {
 
   //! \brief The string, encoded in UTF-16, and terminated with a UTF-16 `NUL`
   //!     code unit (two `NUL` bytes).
-  char16 Buffer[0];
+  base::char16 Buffer[0];
 };
 
 //! \brief Minidump stream type values for MINIDUMP_DIRECTORY::StreamType. Each
@@ -809,7 +809,7 @@ struct __attribute__((packed, aligned(4))) MINIDUMP_MISC_INFO_4
   //!
   //! On Windows 8.1 (NT 6.3), this is “6.3.9600.17031
   //! (winblue_gdr.140221-1952)”.
-  char16 BuildString[260];
+  base::char16 BuildString[260];
 
   //! \brief The minidump producer’s “build string”, a string identifying the
   //!     module that produced a minidump file.
@@ -818,7 +818,7 @@ struct __attribute__((packed, aligned(4))) MINIDUMP_MISC_INFO_4
   //!
   //! On Windows 8.1 (NT 6.3), this may be “dbghelp.i386,6.3.9600.16520” or
   //! “dbghelp.amd64,6.3.9600.16520” depending on CPU architecture.
-  char16 DbgBldStr[40];
+  base::char16 DbgBldStr[40];
 };
 
 //! \brief The latest known version of the MINIDUMP_MISC_INFO structure.