Invoke CallToRuntime via Thread instead of ObjectPools.

runtime/vm/assembler_ia32.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_IA32_H_
 #define VM_ASSEMBLER_IA32_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_ia32.h directly; use assembler.h instead.
 #endif
@@ skipping 720 matching lines @@
 
   // Create a frame for calling into runtime that preserves all volatile
   // registers.  Frame's RSP is guaranteed to be correctly aligned and
   // frame_space bytes are reserved under it.
   void EnterCallRuntimeFrame(intptr_t frame_space);
   void LeaveCallRuntimeFrame();
 
   void CallRuntime(const RuntimeEntry& entry, intptr_t argument_count);
 
   void Call(const StubEntry& stub_entry);
+  void CallToRuntime();
 
   void Jmp(const StubEntry& stub_entry);
   void J(Condition condition, const StubEntry& stub_entry);
 
   /*
    * Loading and comparing classes of objects.
    */
   void LoadClassId(Register result, Register object);
 
   void LoadClassById(Register result, Register class_id);
@@ skipping 314 matching lines @@
 }
 
 
 inline void Assembler::EmitOperandSizeOverride() {
   EmitUint8(0x66);
 }
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_IA32_H_