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

ash/touch/touch_observer_hud.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/touch/touch_observer_hud.h"
 
 #include "ash/display/display_controller.h"
 #include "ash/display/display_manager.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/property_util.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/stringprintf.h"
 #include "base/strings/string_number_conversions.h"
-#include "base/utf_string_conversions.h"
+#include "base/strings/utf_string_conversions.h"
 #include "third_party/skia/include/core/SkPath.h"
 #include "third_party/skia/include/core/SkXfermode.h"
 #include "third_party/skia/include/effects/SkGradientShader.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/window.h"
 #include "ui/base/animation/animation_delegate.h"
 #include "ui/base/animation/linear_animation.h"
 #include "ui/base/events/event.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/display.h"
@@ skipping 697 matching lines @@
                           internal::kShellWindowId_OverlayContainer));
 
   RootWindowController* controller = GetRootWindowController(root_window_);
   controller->set_touch_observer_hud(this);
 
   root_window_->AddPreTargetHandler(this);
 }
 
 }  // namespace internal
 }  // namespace ash