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

ash/drag_drop/drag_drop_controller_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/drag_drop/drag_drop_controller.h"
 
 #include "ash/drag_drop/drag_drop_tracker.h"
 #include "ash/drag_drop/drag_image_view.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "base/command_line.h"
 #include "base/location.h"
-#include "base/utf_string_conversions.h"
+#include "base/strings/utf_string_conversions.h"
 #include "ui/aura/client/capture_client.h"
 #include "ui/aura/root_window.h"
 #include "ui/aura/test/event_generator.h"
 #include "ui/base/animation/linear_animation.h"
 #include "ui/base/clipboard/clipboard.h"
 #include "ui/base/clipboard/scoped_clipboard_writer.h"
 #include "ui/base/dragdrop/drag_drop_types.h"
 #include "ui/base/dragdrop/drag_utils.h"
 #include "ui/base/dragdrop/os_exchange_data.h"
 #include "ui/base/events/event.h"
@@ skipping 1179 matching lines @@
     RunAllPendingInMessageLoop();
   }
 
   // End dragging.
   DispatchGesture(ui::ET_GESTURE_SCROLL_END, gesture_location);
   EXPECT_TRUE(drag_drop_controller_->drop_received_);
 }
 
 }  // namespace test
 }  // namespace aura