Use a direct include of utf_string_conversions.h in android_webview/, apps/, ash/, base/.

ash/shell_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 "ash/shell.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "ash/ash_switches.h"
 #include "ash/desktop_background/desktop_background_widget_controller.h"
 #include "ash/launcher/launcher.h"
 #include "ash/root_window_controller.h"
 #include "ash/session_state_delegate.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell_window_ids.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/wm/root_window_layout_manager.h"
 #include "ash/wm/window_util.h"
-#include "base/utf_string_conversions.h"
+#include "base/strings/utf_string_conversions.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/window.h"
 #include "ui/gfx/size.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_delegate.h"
 #include "ui/views/window/dialog_delegate.h"
 
 using aura::RootWindow;
 
@@ skipping 409 matching lines @@
  private:
   DISALLOW_COPY_AND_ASSIGN(ShellTest2);
 };
 
 TEST_F(ShellTest2, DontCrashWhenWindowDeleted) {
   window_.reset(new aura::Window(NULL));
   window_->Init(ui::LAYER_NOT_DRAWN);
 }
 
 }  // namespace ash