PPAPI: implement GetSupportedPreviewSizes

ppapi/thunk/ppb_camera_capabilities_api.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 PPAPI_THUNK_PPB_CAMERA_CAPABILITIES_API_H_
+#define PPAPI_THUNK_PPB_CAMERA_CAPABILITIES_API_H_
+
+#include "ppapi/c/private/ppb_camera_capabilities_private.h"
+#include "ppapi/thunk/ppapi_thunk_export.h"
+
+namespace ppapi {
+
+namespace thunk {
+
+class PPAPI_THUNK_EXPORT PPB_CameraCapabilities_API {
+ public:
+  virtual ~PPB_CameraCapabilities_API() {}
+  virtual void GetSupportedPreviewSizes(int32_t* array_size,
+                                        PP_Size** preview_sizes) = 0;
+};
+
+}  // namespace thunk
+}  // namespace ppapi
+
+#endif  // PPAPI_THUNK_PPB_CAMERA_CAPABILITIES_API_H_