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 base {
+
+struct FileDescriptor;
+
+}  // namespace base
+
+namespace ui {
+
+// The Ozone interface allows external implementations to hook into Chromium to
+// provide the handle of a system specific surface implementation for Browser
+// and Render process.

[reveman, 2015/07/22 16:59:55]

system specific surface implementation?

[dshwang, 2015/07/23 14:02:28]

s/system specific surface implementation/native surface/

+class OZONE_EXPORT NativePixmapManager {
+ public:
+  static NativePixmapManager* GetInstance();
+  static void SetInstance(NativePixmapManager* instance);
+
+  static scoped_ptr<NativePixmapManager> Create(
+      const base::FileDescriptor& device_fd);
+
+  virtual ~NativePixmapManager();
+
+  struct Configuration {
+    SurfaceFactoryOzone::BufferFormat format;
+    SurfaceFactoryOzone::BufferUsage usage;
+  };
+
+  // Gets supported format/usage configurations.
+  virtual std::vector<Configuration> GetSupportedNativePixmapConfigurations()
+      const = 0;
+
+ protected:
+  NativePixmapManager();
+
+  virtual void Initialize(const base::FileDescriptor& device_fd) = 0;

[reveman, 2015/07/22 16:59:55]

do you really need this when you have the static factory method above?

[dshwang, 2015/07/23 14:02:28]

It's needed for next CL. I move this to next CL.

+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(NativePixmapManager);
+};
+
+// Platforms which don't need to share native pixmap use this.
+NativePixmapManager* CreateStubNativePixmapManager();

[reveman, 2015/07/22 16:59:55]

Does this deserve it's own file? Who owns the pointer returned?

[dshwang, 2015/07/23 14:02:28]

Make sense. I move it to ui/ozone/common/stub_native_pixmap_manager.h
I did follow existing pattern in public/. e.g. CreateStubGpuPlatformSupport(),
CreateStubGpuPlatformSupportHost(), CreateStubInputController()
I'll move them to common/ later.

+
+}  // namespace ui
+
+#endif  // UI_OZONE_PUBLIC_NATIVE_PIXMAP_MANAGER_H_