Add IsMutatorThread to the Thread class and use it instead of MutatorThreadIsCurrentThread

runtime/vm/dart_entry.cc

 // Copyright (c) 2011, 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_entry.h"
 
 #include "vm/class_finalizer.h"
 #include "vm/code_generator.h"
 #include "vm/compiler.h"
 #include "vm/debugger.h"
@@ skipping 66 matching lines @@
 
 RawObject* DartEntry::InvokeFunction(const Function& function,
                                      const Array& arguments,
                                      const Array& arguments_descriptor) {
   // Get the entrypoint corresponding to the function specified, this
   // will result in a compilation of the function if it is not already
   // compiled.
   Thread* thread = Thread::Current();
   Zone* zone = thread->zone();
   Isolate* isolate = thread->isolate();
-  ASSERT(isolate->MutatorThreadIsCurrentThread());
+  ASSERT(thread->IsMutatorThread());
   if (!function.HasCode()) {
     const Error& error = Error::Handle(
         zone, Compiler::CompileFunction(thread, function));
     if (!error.IsNull()) {
       return error.raw();
     }
   }
   // Now Call the invoke stub which will invoke the dart function.
   invokestub entrypoint = reinterpret_cast<invokestub>(
       StubCode::InvokeDartCode_entry()->EntryPoint());
@@ skipping 481 matching lines @@
   const Array& args = Array::Handle(Array::New(kNumArguments));
   args.SetAt(0, map);
   args.SetAt(1, key);
   args.SetAt(2, value);
   const Object& result = Object::Handle(DartEntry::InvokeFunction(function,
                                                                   args));
   return result.raw();
 }
 
 }  // namespace dart