Change the DidChangeView update to take a new ViewChanged resource.

ppapi/thunk/ppb_view_api.h

Index: ppapi/thunk/ppb_view_api.h
diff --git a/ppapi/thunk/ppb_view_api.h b/ppapi/thunk/ppb_view_api.h
new file mode 100644
index 0000000000000000000000000000000000000000..377658ae2dbd50944c0057e4d1cd1c4e37cf1ab9
--- /dev/null
+++ b/ppapi/thunk/ppb_view_api.h
@@ -0,0 +1,31 @@
+// 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_THUNK_PPB_VIEW_API_H_
+#define PPAPI_THUNK_PPB_VIEW_API_H_
+
+#include "ppapi/thunk/ppapi_thunk_export.h"
+
+namespace ppapi {
+
+struct ViewData;
+
+namespace thunk {
+
+class PPAPI_THUNK_EXPORT PPB_View_API {
+ public:
+  virtual ~PPB_View_API() {}
+
+  // Returns the view data struct. We could have virtual functions here for
+  // each PPAPI function, but that would be more boilerplate for these simple
+  // getters so the logic is implemented in the thunk layer. If we start
+  // autogenerating the thunk layer and need this to be more regular, adding
+  // the API functions here should be fine.
+  virtual const ViewData& GetData() const = 0;
+};
+
+}  // namespace thunk
+}  // namespace ppapi
+
+#endif // PPAPI_THUNK_PPB_VIEW_API_H_