Subzero: Use C++11 member initializers where practical.

src/IceCompileServer.h

 //===- subzero/src/IceCompileServer.h - Compile server ----------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file declares the compile server. Given a compiler implementation,
@@ skipping 27 matching lines @@
 // the request immediately.  When run in the browser, it blocks waiting
 // for a request.
 class CompileServer {
   CompileServer() = delete;
   CompileServer(const CompileServer &) = delete;
   CompileServer &operator=(const CompileServer &) = delete;
 
 public:
   explicit CompileServer(Compiler &Comp) : Comp(Comp) {}
 
-  virtual ~CompileServer() {}
+  virtual ~CompileServer() = default;
 
   virtual void run() = 0;
 
   virtual ErrorCode &getErrorCode() { return LastError; }
   void transferErrorCode(ErrorCodes Code) { LastError.assign(Code); }
 
 protected:
   Compiler &getCompiler() const { return Comp; }
 
   Compiler &Comp;
@@ skipping 16 matching lines @@
 
 private:
   int argc;
   char **argv;
   std::unique_ptr<GlobalContext> Ctx;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICECOMPILESERVER_H