Canonicalize TypeArguments.

runtime/vm/raw_object.h

 // Copyright (c) 2011, 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_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "vm/assert.h"
 #include "vm/globals.h"
 #include "vm/snapshot.h"
@@ skipping 319 matching lines @@
 };
 
 
 class RawTypeArguments : public RawAbstractTypeArguments {
  private:
   RAW_HEAP_OBJECT_IMPLEMENTATION(TypeArguments);
 
   RawObject** from() {
     return reinterpret_cast<RawObject**>(&ptr()->length_);
   }
+  bool is_canonical_;
   RawSmi* length_;
 
   // Variable length data follows here.
   RawAbstractType* types_[0];
   RawObject** to(intptr_t length) {
     return reinterpret_cast<RawObject**>(&ptr()->types_[length - 1]);
   }
 };
 
 
@@ skipping 505 matching lines @@
   intptr_t type_;  // Uninitialized, simple or complex.
   intptr_t flags_;  // Represents global/local, case insensitive, multiline.
 
   // Variable length data follows here.
   uint8_t data_[0];
 };
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_