stub webkit/child/ and webkitplatformsupport_child_impl for transition

webkit/child/webkitplatformsupport_child_impl.cc

Index: webkit/child/webkitplatformsupport_child_impl.cc
diff --git a/webkit/child/webkitplatformsupport_child_impl.cc b/webkit/child/webkitplatformsupport_child_impl.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b9a06621e5b6fa0d3db797ca844233e1089f7242
--- /dev/null
+++ b/webkit/child/webkitplatformsupport_child_impl.cc
@@ -0,0 +1,15 @@
+// Copyright 2013 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 "webkit/child/webkitplatformsupport_child_impl.h"
+
+namespace webkit_glue {
+
+WebKitPlatformSupportChildImpl::WebKitPlatformSupportChildImpl() {
+}
+
+WebKitPlatformSupportChildImpl::~WebKitPlatformSupportChildImpl() {
+}
+
+}  // namespace webkit_glue