Change the zone allocation api.

runtime/lib/isolate.cc

 // 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.
 
 #include "platform/assert.h"
 #include "vm/bootstrap_natives.h"
 #include "vm/class_finalizer.h"
 #include "vm/dart.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
@@ skipping 233 matching lines @@
   const Library& library =
       Library::Handle(isolate->object_store()->root_library());
   ASSERT(!library.IsNull());
   const String& script_name = String::Handle(library.url());
   return isolate->current_zone()->MakeCopyOfString(script_name.ToCString());
 }
 
 
 static char* BuildMainName(const char* class_name) {
   intptr_t len = OS::SNPrint(NULL, 0, "%s.main", class_name) + 1;
-  char* chars = reinterpret_cast<char*>(
-      Isolate::Current()->current_zone()->Allocate(len));
+  char* chars = Isolate::Current()->current_zone()->Alloc<char>(len);
   OS::SNPrint(chars, len, "%s.main", class_name);
   return chars;
 }
 
 
 DEFINE_NATIVE_ENTRY(IsolateNatives_start, 2) {
   Isolate* preserved_isolate = Isolate::Current();
   GET_NATIVE_ARGUMENT(Instance, runnable, arguments->At(0));
   // arguments->At(1) unused.
   const Class& runnable_class = Class::Handle(runnable.clazz());
@@ skipping 382 matching lines @@
 
 DEFINE_NATIVE_ENTRY(isolate_getPortInternal, 0) {
   const Object& port = Object::Handle(ReceivePortCreate(isolate->main_port()));
   if (port.IsError()) {
     Exceptions::PropagateError(Error::Cast(port));
   }
   arguments->SetReturn(port);
 }
 
 }  // namespace dart