Use C++11 deleted functions feature if available.

src/globals.h

Index: src/globals.h
diff --git a/src/globals.h b/src/globals.h
index f00e676dde9866b9eb7bb2005d80ed4766da46a2..e695e94d4e6b465b555edc405f588d6ab0ec287d 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -327,11 +327,18 @@ F FUNCTION_CAST(Address addr) {
 }
 
 
+#if __cplusplus >= 201103L
+#define DISALLOW_BY_DELETE = delete
+#else
+#define DISALLOW_BY_DELETE
+#endif
+
+
 // A macro to disallow the evil copy constructor and operator= functions
 // This should be used in the private: declarations for a class
-#define DISALLOW_COPY_AND_ASSIGN(TypeName)      \
-  TypeName(const TypeName&);                    \
-  void operator=(const TypeName&)
+#define DISALLOW_COPY_AND_ASSIGN(TypeName)           \
+  TypeName(const TypeName&) DISALLOW_BY_DELETE;      \
+  void operator=(const TypeName&) DISALLOW_BY_DELETE
 
 
 // A macro to disallow all the implicit constructors, namely the
@@ -341,7 +348,7 @@ F FUNCTION_CAST(Address addr) {
 // that wants to prevent anyone from instantiating it. This is
 // especially useful for classes containing only static methods.
 #define DISALLOW_IMPLICIT_CONSTRUCTORS(TypeName) \
-  TypeName();                                    \
+  TypeName() DISALLOW_BY_DELETE;                 \
   DISALLOW_COPY_AND_ASSIGN(TypeName)