ozone: Introduce ClientPixmap and ClientPixmapFactory for non-GPU processes.

ui/ozone/platform/cast/native_pixmap_manager_cast.cc

Index: ui/ozone/platform/cast/native_pixmap_manager_cast.cc
diff --git a/ui/ozone/platform/cast/native_pixmap_manager_cast.cc b/ui/ozone/platform/cast/native_pixmap_manager_cast.cc
new file mode 100644
index 0000000000000000000000000000000000000000..4129500c21a8e092d1e9716e62ea9aa37c7f112e
--- /dev/null
+++ b/ui/ozone/platform/cast/native_pixmap_manager_cast.cc
@@ -0,0 +1,15 @@
+// Copyright 2015 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 "ui/ozone/platform/cast/native_pixmap_manager_cast.h"
+
+#include "ui/ozone/common/stub_native_pixmap_manager.h"
+
+namespace ui {
+
+NativePixmapManager* CreateNativePixmapManagerCast() {
+  return CreateStubNativePixmapManager();
+}
+
+}  // namespace ui