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

ui/ozone/public/native_pixmap_manager.h

+// 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.
+
+#ifndef UI_OZONE_PUBLIC_NATIVE_PIXMAP_MANAGER_H_
+#define UI_OZONE_PUBLIC_NATIVE_PIXMAP_MANAGER_H_
+
+#include <vector>
+
+#include "ui/ozone/ozone_export.h"
+#include "ui/ozone/public/surface_factory_ozone.h"
+
+namespace ui {
+
+// The Ozone interface allows external implementations to hook into Chromium to
+// provide the handle of a native surface for Browser and Render process.

[reveman, 2015/07/23 14:46:12]

do you mean native pixmap and not native surface?

[dshwang, 2015/07/23 16:42:09]

I though native pixmap is the handle of a native surface. native surface could
be dma_buf, ION or etc.
To be succinct, I change "the handle of a native surface" to "native pixmap".

+class OZONE_EXPORT NativePixmapManager {
+ public:
+  static NativePixmapManager* GetInstance();
+  static void SetInstance(scoped_ptr<NativePixmapManager> instance);

[reveman, 2015/07/23 14:46:12]

s/scoped_ptr<NativePixmapManager> instance/NativePixmapManager* instance/

SetInstance shouldn't take ownership instance. Ownership and lifetime management
should stay with the caller.

[dshwang, 2015/07/23 16:42:09]

oh, interesting. done.

+
+  static scoped_ptr<NativePixmapManager> Create();
+
+  virtual ~NativePixmapManager();
+
+  struct Configuration {
+    SurfaceFactoryOzone::BufferFormat format;
+    SurfaceFactoryOzone::BufferUsage usage;
+  };
+
+  // Gets supported format/usage configurations.
+  virtual std::vector<Configuration> GetSupportedNativePixmapConfigurations()
+      const = 0;
+
+ protected:
+  NativePixmapManager();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(NativePixmapManager);
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PUBLIC_NATIVE_PIXMAP_MANAGER_H_