Fix the NaCl bitstream reader to report fatal errors.

lib/Bitcode/NaCl/Analysis/NaClObjDump.cpp

Index: lib/Bitcode/NaCl/Analysis/NaClObjDump.cpp
diff --git a/lib/Bitcode/NaCl/Analysis/NaClObjDump.cpp b/lib/Bitcode/NaCl/Analysis/NaClObjDump.cpp
index c313eeb74e1e89589f23c068ce036ff58bebd3e3..119dbbf1f4b77e2d3a7b337c41e291e96eee5bee 100644
--- a/lib/Bitcode/NaCl/Analysis/NaClObjDump.cpp
+++ b/lib/Bitcode/NaCl/Analysis/NaClObjDump.cpp
@@ -591,21 +591,23 @@ public:
   }
 
   /// Generates an error with the given message.
-  bool Error(const std::string &Message) override {
+  bool ErrorAt(uint64_t Bit, const std::string &Message) final {
     // Use local error routine so that all errors are treated uniformly.
-    ObjDump.Error() << Message << "\n";
+    ObjDump.Error(Bit) << Message << "\n";
     return true;
   }
 
   /// Flushes out objdump and then exits with fatal error.
+  LLVM_ATTRIBUTE_NORETURN
   void Fatal() {
-    Fatal("");
+    NaClBitcodeParser::Fatal();
   }
 
   /// Flushes out objdump and then exits with fatal error, using
   /// the given message.
-  void Fatal(const std::string &Message) {
-    ObjDump.Fatal(Message);
+  LLVM_ATTRIBUTE_NORETURN
+  void FatalAt(uint64_t Bit, const std::string &Message) final {
+    ObjDump.Fatal(Bit, Message);
   }
 
   /// Parses the top-level module block.
@@ -1371,8 +1373,8 @@ protected:
     return Context->Fatal();
   }
 
-  void Fatal(const std::string &Message) {
-    return Context->Fatal(Message);
+  void FatalAt(uint64_t Bit, const std::string &Message) override {
+    return Context->FatalAt(Bit, Message);
   }
 
   const std::string &GetAssemblyIndent() const {