Add DISALLOW_COPY_AND_ASSIGN to subclasses of ValueObject and make ValueObject copyable.

runtime/vm/assembler_mips.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_ASSEMBLER_MIPS_H_
 #define VM_ASSEMBLER_MIPS_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_mips.h directly; use assembler.h instead.
 #endif
 
 #include "platform/assert.h"
 #include "vm/constants_mips.h"
 
 namespace dart {
 
 class Operand : public ValueObject {
- public:
-  Operand(const Operand& other) : ValueObject() {
-    UNIMPLEMENTED();
-  }
-
-  Operand& operator=(const Operand& other) {
-    UNIMPLEMENTED();
-    return *this;
-  }
-
  protected:
   Operand() { }  // Needed by subclass Address.
 };
 
 
 class Address : public Operand {
  public:
   Address(Register base, int32_t disp) {
     UNIMPLEMENTED();
   }
-
-  Address(const Address& other) : Operand(other) { }
-
-  Address& operator=(const Address& other) {
-    Operand::operator=(other);
-    return *this;
-  }
 };
 
 
 class FieldAddress : public Address {
  public:
   FieldAddress(Register base, int32_t disp)
       : Address(base, disp - kHeapObjectTag) { }
-
-  FieldAddress(const FieldAddress& other) : Address(other) { }
-
-  FieldAddress& operator=(const FieldAddress& other) {
-    Address::operator=(other);
-    return *this;
-  }
 };
 
 
 class Label : public ValueObject {
  public:
   Label() : position_(0) { }
 
   ~Label() {
     // Assert if label is being destroyed with unresolved branches pending.
     ASSERT(!IsLinked());
@@ skipping 122 matching lines @@
 
    private:
     intptr_t pc_offset_;
     const String& comment_;
 
     DISALLOW_COPY_AND_ASSIGN(CodeComment);
   };
 
   GrowableArray<CodeComment*> comments_;
 
-  DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_MIPS_H_