Extract a delegate interface from c/b/input_method to permit decoupling from c/b.

chrome/browser/chromeos/input_method/xkeyboard_unittest.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/xkeyboard.h"
 
 #include <algorithm>
 #include <set>
 #include <string>
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "chrome/browser/chromeos/input_method/input_method_util.h"
 #include "chrome/browser/chromeos/input_method/input_method_whitelist.h"
+#include "chrome/browser/chromeos/input_method/mock_input_method_delegate.h"
 #include "content/public/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/x/x11_util.h"
 
 #include <X11/Xlib.h>
 
 using content::BrowserThread;
 
 namespace chromeos {
 namespace input_method {
 
 namespace {
 
 class XKeyboardTest : public testing::Test {
  public:
   XKeyboardTest()
-      : util_(whitelist_.GetSupportedInputMethods()),
+      : util_(&delegate_, whitelist_.GetSupportedInputMethods()),
         ui_thread_(BrowserThread::UI, &message_loop_) {
   }
 
   virtual void SetUp() {
     xkey_.reset(XKeyboard::Create(util_));
   }
 
   virtual void TearDown() {
     xkey_.reset();
   }
 
+  MockInputMethodDelegate delegate_;
   InputMethodWhitelist whitelist_;
   InputMethodUtil util_;
   scoped_ptr<XKeyboard> xkey_;
 
   MessageLoopForUI message_loop_;
   content::TestBrowserThread ui_thread_;
 };
 
 // Returns true if X display is available.
 bool DisplayAvailable() {
@@ skipping 158 matching lines @@
 
   // Restore the initial state.
   EXPECT_TRUE(XKeyboard::SetAutoRepeatRate(rate));
   EXPECT_TRUE(XKeyboard::GetAutoRepeatRateForTesting(&tmp));
   EXPECT_EQ(rate.initial_delay_in_ms, tmp.initial_delay_in_ms);
   EXPECT_EQ(rate.repeat_interval_in_ms, tmp.repeat_interval_in_ms);
 }
 
 }  // namespace input_method
 }  // namespace chromeos