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

ui/ozone/common/stub_client_native_pixmap_factory.cc

+// 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/common/stub_client_native_pixmap_factory.h"
+
+#include "base/file_descriptor_posix.h"
+
+namespace ui {
+
+namespace {
+
+class StubClientNativePixmapFactory : public ClientNativePixmapFactory {
+ public:
+  StubClientNativePixmapFactory() {}
+  ~StubClientNativePixmapFactory() override {}
+
+  // ClientNativePixmapFactory:
+  std::vector<Configuration> GetSupportedConfigurations() const override {
+    return std::vector<Configuration>();
+  }
+  scoped_ptr<ClientNativePixmap> ImportNativePixmap(
+      const base::FileDescriptor& handle,
+      const gfx::Size& size,
+      gfx::BufferFormat format,
+      gfx::BufferUsage usage) override {
+    NOTIMPLEMENTED();
+    return nullptr;
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(StubClientNativePixmapFactory);
+};
+
+}  // namespace
+
+ClientNativePixmapFactory* CreateStubClientNativePixmapFactory() {
+  return new StubClientNativePixmapFactory;
+}
+
+}  // namespace ui