Create frequently used symbols in the vm isolate

vm/object.h

 // Copyright (c) 2012, 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_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 347 matching lines @@
 
   uword raw_value() const {
     return reinterpret_cast<uword>(raw());
   }
 
   inline void SetRaw(RawObject* value);
 
   cpp_vtable vtable() const { return bit_copy<cpp_vtable>(*this); }
   void set_vtable(cpp_vtable value) { *vtable_address() = value; }
 
-  static RawObject* Allocate(const Class& cls,
+  static RawObject* Allocate(intptr_t cls_id,
                              intptr_t size,
                              Heap::Space space);
 
   static intptr_t RoundedAllocationSize(intptr_t size) {
     return Utils::RoundUp(size, kObjectAlignment);
   }
 
   template<typename type> void StorePointer(type* addr, type value) const {
     // TODO(iposva): Implement real store barrier here.
     *addr = value;
@@ skipping 4789 matching lines @@
     if (this->CharAt(i) != str.CharAt(begin_index + i)) {
       return false;
     }
   }
   return true;
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_