Add DISALLOW_COPY_AND_ASSIGN to subclasses of ValueObject and make ValueObject copyable.

runtime/vm/locations.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_LOCATIONS_H_
 #define VM_LOCATIONS_H_
 
 #include "vm/allocation.h"
 #include "vm/assembler.h"
 #include "vm/bitfield.h"
@@ skipping 54 matching lines @@
 
     // FpuRegister location represents a fixed fpu register.  Payload contains
     // its code.
     kFpuRegister = 7,
   };
 
   Location() : value_(kInvalidLocation) {
     ASSERT(IsInvalid());
   }
 
-  Location(const Location& other) : ValueObject(), value_(other.value_) { }
-
-  Location& operator=(const Location& other) {
-    value_ = other.value_;
-    return *this;
-  }
-
   bool IsInvalid() const {
     return value_ == kInvalidLocation;
   }
 
   // Constants.
   bool IsConstant() const {
     ASSERT((kConstant & kConstantMask) == kConstant);
     return (value_ & kConstantMask) == kConstant;
   }
 
@@ skipping 393 matching lines @@
   BitmapBuilder* stack_bitmap_;
 
   const ContainsCall contains_call_;
   RegisterSet live_registers_;
 };
 
 
 }  // namespace dart
 
 #endif  // VM_LOCATIONS_H_