[DWARF parser] Cleanup code in DWARFDebugAbbrev.

No functionality change.

llvm-svn: 207274
diff --git a/llvm/lib/DebugInfo/DWARFContext.cpp b/llvm/lib/DebugInfo/DWARFContext.cpp
index 76d6106..e74f1ac 100644
--- a/llvm/lib/DebugInfo/DWARFContext.cpp
+++ b/llvm/lib/DebugInfo/DWARFContext.cpp
@@ -218,7 +218,7 @@
   DataExtractor abbrData(getAbbrevSection(), isLittleEndian(), 0);
 
   Abbrev.reset(new DWARFDebugAbbrev());
-  Abbrev->parse(abbrData);
+  Abbrev->extract(abbrData);
   return Abbrev.get();
 }
 
@@ -228,7 +228,7 @@
 
   DataExtractor abbrData(getAbbrevDWOSection(), isLittleEndian(), 0);
   AbbrevDWO.reset(new DWARFDebugAbbrev());
-  AbbrevDWO->parse(abbrData);
+  AbbrevDWO->extract(abbrData);
   return AbbrevDWO.get();
 }