Ensure that calls to EnableGrowthControl/DisableGrowthControl does not reset the last_usage_ value …

runtime/vm/dart.cc

 // 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.
 
 #include "vm/dart.h"
 
 #include "vm/code_observers.h"
 #include "vm/cpu.h"
 #include "vm/dart_api_state.h"
 #include "vm/dart_entry.h"
@@ skipping 454 matching lines @@
       Code::Handle(I->object_store()->megamorphic_miss_code());
   I->set_ic_miss_code(miss_code);
 
   if (snapshot_buffer == NULL) {
     const Error& error = Error::Handle(I->object_store()->PreallocateObjects());
     if (!error.IsNull()) {
       return error.raw();
     }
   }
 
-  I->heap()->EnableGrowthControl();
+  I->heap()->InitGrowthControl();
   I->set_init_callback_data(data);
   Api::SetupAcquiredError(I);
   if (FLAG_print_class_table) {
     I->class_table()->Print();
   }
 
   ServiceIsolate::MaybeMakeServiceIsolate(I);
   if (!ServiceIsolate::IsServiceIsolate(I)) {
     I->message_handler()->set_should_pause_on_start(
         FLAG_pause_isolates_on_start);
@@ skipping 73 matching lines @@
   return predefined_handles_->handles_.IsValidScopedHandle(address);
 }
 
 
 bool Dart::IsReadOnlyApiHandle(Dart_Handle handle) {
   ASSERT(predefined_handles_ != NULL);
   return predefined_handles_->api_handles_.IsValidHandle(handle);
 }
 
 }  // namespace dart