Fix decoding of object pool access in code patching on ARM.

runtime/vm/assembler_arm.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_ARM_H_
 #define VM_ASSEMBLER_ARM_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_arm.h directly; use assembler.h instead.
 #endif
@@ skipping 48 matching lines @@
   }
 
   friend class Assembler;
   DISALLOW_COPY_AND_ASSIGN(Label);
 };
 
 
 class CPUFeatures : public AllStatic {
  public:
   static void InitOnce();
-  static bool double_truncate_round_supported() {
-    UNIMPLEMENTED();
-    return false;
-  }
+  static bool double_truncate_round_supported() { return false; }
   static bool integer_division_supported();
 #if defined(USING_SIMULATOR)
   static void set_integer_division_supported(bool supported);
 #endif
  private:
   static bool integer_division_supported_;
 #if defined(DEBUG)
   static bool initialized_;
 #endif
 };
@@ skipping 719 matching lines @@
                                   Register value,
                                   Label* no_update);
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_ARM_H_