PPAPI: implement GetSupportedPreviewSizes

ppapi/thunk/ppb_image_capture_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_IMAGE_CAPTURE_API_H_
+#define PPAPI_THUNK_PPB_IMAGE_CAPTURE_API_H_
+
+#include <string>
+
+#include "ppapi/c/private/ppb_image_capture_private.h"
+
+namespace ppapi {
+
+class TrackedCallback;
+
+namespace thunk {
+
+class PPB_ImageCapture_API {
+ public:
+  virtual ~PPB_ImageCapture_API() {}
+  virtual int32_t Open(PP_Var device_id,
+                       const scoped_refptr<TrackedCallback>& callback) = 0;
+  virtual void Close() = 0;
+  virtual int32_t GetCameraCapabilities(
+      PP_Resource* capabilities,
+      const scoped_refptr<TrackedCallback>& callback) = 0;
+};
+
+}  // namespace thunk
+}  // namespace ppapi
+
+#endif  // PPAPI_THUNK_PPB_IMAGE_CAPTURE_API_H_