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

ui/ozone/platform/caca/native_pixmap_manager_caca.cc

Index: ui/ozone/platform/caca/native_pixmap_manager_caca.cc
diff --git a/ui/ozone/platform/caca/native_pixmap_manager_caca.cc b/ui/ozone/platform/caca/native_pixmap_manager_caca.cc
new file mode 100644
index 0000000000000000000000000000000000000000..8020b84a2242531651e2c41c9eab322e29a8a7f0
--- /dev/null
+++ b/ui/ozone/platform/caca/native_pixmap_manager_caca.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/caca/native_pixmap_manager_caca.h"
+
+#include "ui/ozone/common/stub_native_pixmap_manager.h"
+
+namespace ui {
+
+NativePixmapManager* CreateNativePixmapManagerCaca() {
+  return CreateStubNativePixmapManager();
+}
+
+}  // namespace ui