Renames the isolate's mutator_thread_ to scheduled_mutator_thread_

runtime/vm/base_isolate.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 RUNTIME_VM_BASE_ISOLATE_H_
 #define RUNTIME_VM_BASE_ISOLATE_H_
 
 #include "platform/assert.h"
 #include "vm/globals.h"
 
 namespace dart {
 
 class HandleScope;
 class StackResource;
 class Thread;
 class Zone;
 
 // A BaseIsolate contains just enough functionality to allocate
 // StackResources.  This allows us to inline the StackResource
 // constructor/destructor for performance.

[rmacnak, 2017/08/07 22:44:06]

Wow, this comment is out of date :)

 class BaseIsolate {
  public:
 #if defined(DEBUG)
   void AssertCurrentThreadIsMutator() const;
 #else
   void AssertCurrentThreadIsMutator() const {}
 #endif  // DEBUG
 
 #if defined(DEBUG)
   static void AssertCurrent(BaseIsolate* isolate);
 #endif
 
  protected:
-  BaseIsolate() : mutator_thread_(NULL) {}
+  BaseIsolate() : scheduled_mutator_thread_(NULL) {}
 
   ~BaseIsolate() {
     // Do not delete stack resources: top_resource_ and current_zone_.
   }
 
-  Thread* mutator_thread_;
+  Thread* scheduled_mutator_thread_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BaseIsolate);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_BASE_ISOLATE_H_