Use error_code in GVMaterializer.

They just propagate out the bitcode reader error, so we don't need a new enum.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194091 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Bitcode/Reader/BitcodeReader.h b/lib/Bitcode/Reader/BitcodeReader.h
index b03658b..c5d345b 100644
--- a/lib/Bitcode/Reader/BitcodeReader.h
+++ b/lib/Bitcode/Reader/BitcodeReader.h
@@ -249,8 +249,8 @@
 
   virtual bool isMaterializable(const GlobalValue *GV) const;
   virtual bool isDematerializable(const GlobalValue *GV) const;
-  virtual bool Materialize(GlobalValue *GV, std::string *ErrInfo = 0);
-  virtual bool MaterializeModule(Module *M, std::string *ErrInfo = 0);
+  virtual error_code Materialize(GlobalValue *GV);
+  virtual error_code MaterializeModule(Module *M);
   virtual void Dematerialize(GlobalValue *GV);
 
   /// @brief Main interface to parsing a bitcode buffer.