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

ash/system/chromeos/network/network_icon.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/system/chromeos/network/network_icon.h"
 
 #include "ash/shell.h"
 #include "ash/system/chromeos/network/network_icon_animation.h"
 #include "ash/system/chromeos/network/network_icon_animation_observer.h"
-#include "base/utf_string_conversions.h"
+#include "base/strings/utf_string_conversions.h"
 #include "chromeos/network/device_state.h"
 #include "chromeos/network/network_connection_handler.h"
 #include "chromeos/network/network_state.h"
 #include "chromeos/network/network_state_handler.h"
 #include "grit/ash_resources.h"
 #include "grit/ash_strings.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/canvas.h"
@@ skipping 781 matching lines @@
   }
   *animating = network->IsConnectingState();
   // Get icon and label for connected or connecting network.
   *image = GetImageForNetwork(network, icon_type);
   if (label)
     *label = GetLabelForNetwork(network, icon_type);
 }
 
 }  // namespace network_icon
 }  // namespace ash