Pepper and WebKit API change to support a plugin knowing if a scrollbar is an overlay one.

ppapi/cpp/dev/resize_client_dev.h

+// Copyright (c) 2011 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_CPP_DEV_RESIZE_CLIENT_DEV_H_
+#define PPAPI_CPP_DEV_RESIZE_CLIENT_DEV_H_
+
+#include "ppapi/c/pp_stdint.h"
+
+namespace pp {
+
+class Instance;
+
+// This class provides a C++ interface for callbacks to know when a full-frame
+// plugin starts and stops resizing. Only plugins that use the ScrollGroup API
+// need to listen to this.
+class ResizeClient_Dev {
+ public:
+  ResizeClient_Dev(Instance* instance);
+  virtual ~ResizeClient_Dev();
+
+  /**
+   * Notification that the resizing for this full frame plugin has started.
+   */
+  virtual void WillStartLiveResize() = 0;
+
+  /**
+   * Notification that the resizing for this full frame plugin has stopped.
+   */
+  virtual void WillEndLiveResize() = 0;
+
+ private:
+  Instance* associated_instance_;
+};
+
+}  // namespace pp
+
+#endif  // PPAPI_CPP_DEV_RESIZE_CLIENT_DEV_H_