Decouple input_method from BrowserThread (and content/).

chrome/browser/chromeos/input_method/mock_input_method_delegate.cc

 // Copyright (c) 2012 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 "chrome/browser/chromeos/input_method/mock_input_method_delegate.h"
 
+#include "base/logging.h"
+#include "base/sequenced_task_runner.h"
+
 namespace chromeos {
 namespace input_method {
 
 MockInputMethodDelegate::MockInputMethodDelegate()
     : active_locale_("en") {
 }
 
 MockInputMethodDelegate::~MockInputMethodDelegate() {
 }
 
 std::string MockInputMethodDelegate::GetHardwareKeyboardLayout() const {
   return hardware_keyboard_layout_;
 }
 
 std::string MockInputMethodDelegate::GetActiveLocale() const {
   return active_locale_;
 }
 
+scoped_refptr<base::SequencedTaskRunner>
+MockInputMethodDelegate::GetDefaultTaskRunner() const {
+  NOTREACHED();
+  return NULL;
+}
+
+scoped_refptr<base::SequencedTaskRunner>
+MockInputMethodDelegate::GetWorkerTaskRunner() const {
+  NOTREACHED();
+  return NULL;
+}
+
 }  // namespace input_method
 }  // namespace chromeos