Subzero: Remove IceString.

src/IceBrowserCompileServer.h

 //===- subzero/src/IceBrowserCompileServer.h - Browser server ---*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 59 matching lines @@
       LastError.assign(Ctx->getErrorStatus()->value());
     // Reset some state. The InputStream is deleted by the compiler so only
     // reset this to nullptr. Free and flush the rest of the streams.
     InputStream = nullptr;
     EmitStream.reset(nullptr);
     ELFStream.reset(nullptr);
   }
 
   StringStream &getErrorStream() { return *ErrorStream; }
 
-  void setFatalError(const IceString &Reason);
+  void setFatalError(const std::string &Reason);
 
 private:
   class StringStream {
   public:
     StringStream() : StrBuf(Buffer) {}
-    const IceString &getContents() { return StrBuf.str(); }
+    const std::string &getContents() { return StrBuf.str(); }
     Ostream &getStream() { return StrBuf; }
 
   private:
     std::string Buffer;
     llvm::raw_string_ostream StrBuf;
   };
   /// This currently only handles a single compile request, hence one copy of
   /// the state.
   std::unique_ptr<GlobalContext> Ctx;
   /// A borrowed reference to the current InputStream. The compiler owns the
   /// actual reference so the server must be careful not to access after the
   /// compiler is done.
   llvm::QueueStreamer *InputStream = nullptr;
   std::unique_ptr<Ostream> LogStream;
   std::unique_ptr<llvm::raw_fd_ostream> EmitStream;
   std::unique_ptr<StringStream> ErrorStream;
   std::unique_ptr<ELFStreamer> ELFStream;
   ClFlags *Flags;
   std::thread CompileThread;
   std::atomic<bool> HadError;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEBROWSERCOMPILESERVER_H