Migrate 'Instantiation' data and API bits of SLocEntry to 'Expansion'
etc. With this I think essentially all of the SourceManager APIs are
converted. Comments and random other bits of cleanup should be all thats
left.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@136057 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/Lexer.cpp b/lib/Lex/Lexer.cpp
index 25e6113..6c7169f 100644
--- a/lib/Lex/Lexer.cpp
+++ b/lib/Lex/Lexer.cpp
@@ -713,8 +713,7 @@
     return false; // Does not point at the start of token.
 
   SourceLocation expansionLoc =
-    SM.getSLocEntry(infoLoc.first)
-      .getInstantiation().getExpansionLocStart();
+    SM.getSLocEntry(infoLoc.first).getExpansion().getExpansionLocStart();
   if (expansionLoc.isFileID())
     return true; // No other macro expansions, this is the first.
 
@@ -744,7 +743,7 @@
     return false; // Still in the same FileID, does not point to the last token.
   
   SourceLocation expansionLoc =
-    SM.getSLocEntry(FID).getInstantiation().getExpansionLocEnd();
+    SM.getSLocEntry(FID).getExpansion().getExpansionLocEnd();
   if (expansionLoc.isFileID())
     return true; // No other macro expansions.