Get rid of deprecated methods accessing mutator_thread_ instead of current thread

runtime/vm/allocation.h

 // 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.
 
 #ifndef VM_ALLOCATION_H_
 #define VM_ALLOCATION_H_
 
 #include "platform/assert.h"
 #include "vm/base_isolate.h"
 #include "vm/globals.h"
@@ skipping 19 matching lines @@
 };
 
 
 // Stack resources subclass from this base class. The VM will ensure that the
 // destructors of these objects are called before the stack is unwound past the
 // objects location on the stack. Use stack resource objects if objects
 // need to be destroyed even in the case of exceptions when a Longjump is done
 // to a stack frame above the frame where these objects were allocated.
 class StackResource {
  public:
-  // DEPRECATED: Use Thread-based interface. During migration, this defaults
-  // to using the mutator thread (which must also be the current thread).
-  explicit StackResource(Isolate* isolate) : thread_(NULL), previous_(NULL) {
-    Init((isolate == NULL) ?
-        NULL : reinterpret_cast<BaseIsolate*>(isolate)->mutator_thread_);
-  }
-
   explicit StackResource(Thread* thread) : thread_(NULL), previous_(NULL) {
     Init(thread);
   }
 
   virtual ~StackResource();
 
   // Convenient access to the isolate of the thread of this resource.
   Isolate* isolate() const;
 
   // The thread that owns this resource.
@@ skipping 68 matching lines @@
  public:
   NoSafepointScope() {}
  private:
   DISALLOW_COPY_AND_ASSIGN(NoSafepointScope);
 };
 #endif  // defined(DEBUG)
 
 }  // namespace dart
 
 #endif  // VM_ALLOCATION_H_