Remove all but one use of WeakPtrFactory::DetachFromThread.

win8/test/ui_automation_client.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "win8/test/ui_automation_client.h"
 
 #include <atlbase.h>
 #include <atlcom.h>
 #include <oleauto.h>
 #include <uiautomation.h>
@@ skipping 140 matching lines @@
       base::Bind(&UIAutomationClient::Context::HandleAutomationEvent, context_,
                  base::win::ScopedComPtr<IUIAutomationElement>(sender),
                  eventId));
 
   return S_OK;
 }
 
 base::WeakPtr<UIAutomationClient::Context>
     UIAutomationClient::Context::Create() {
   Context* context = new Context();
-  base::WeakPtr<Context> context_ptr(context->weak_ptr_factory_.GetWeakPtr());
-  // Unbind from this thread so that the instance will bind to the automation
-  // thread when Initialize is called.
-  context->weak_ptr_factory_.DetachFromThread();
-  return context_ptr;
+  return context->weak_ptr_factory_.GetWeakPtr();
 }
 
 void UIAutomationClient::Context::DeleteOnAutomationThread() {
   DCHECK(thread_checker_.CalledOnValidThread());
   delete this;
 }
 
 UIAutomationClient::Context::Context() : weak_ptr_factory_(this) {}
 
 UIAutomationClient::Context::~Context() {
@@ skipping 446 matching lines @@
                  context_,
                  base::ThreadTaskRunnerHandle::Get(),
                  string16(class_name),
                  item_name,
                  init_callback,
                  result_callback));
 }
 
 }  // namespace internal
 }  // namespace win8