Convert zoom and widget to IDL

ppapi/c/dev/ppp_zoom_dev.h

 /* Copyright (c) 2010 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.
  */
+
+/* From dev/ppp_zoom_dev.idl modified Fri Aug 26 15:42:06 2011. */
+
 #ifndef PPAPI_C_DEV_PPP_ZOOM_DEV_H_
 #define PPAPI_C_DEV_PPP_ZOOM_DEV_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_instance.h"
+#include "ppapi/c/pp_macros.h"
+#include "ppapi/c/pp_stdint.h"
 
-// Zoom interface should only apply to those full-page "plugin-document".
-#define PPP_ZOOM_DEV_INTERFACE "PPP_Zoom(Dev);0.3"
+#define PPP_ZOOM_DEV_INTERFACE_0_3 "PPP_Zoom(Dev);0.3"
+#define PPP_ZOOM_DEV_INTERFACE PPP_ZOOM_DEV_INTERFACE_0_3
 
+/**
+ * @file
+ * Implementation of the Zoom interface.
+ */
+
+
+/**
+ * @addtogroup Interfaces
+ * @{
+ */
+/**
+ * Zoom interface should only apply to those full-page "plugin-document".
+ */
 struct PPP_Zoom_Dev {
-  // Instruct plug-in to zoom according to the given factor and whether the zoom
-  // only applies to text only.  The scale factor is the percentage divided by
-  // 100, i.e. 150% zoom is 1.5.
-  void (*Zoom)(PP_Instance instance,
-               double factor,
-               PP_Bool text_only);
+  /**
+   * Instruct plug-in to zoom according to the given factor and whether the zoom
+   * only applies to text only.  The scale factor is the percentage divided by
+   * 100, i.e. 150% zoom is 1.5.
+   */
+  void (*Zoom)(PP_Instance instance, double factor, PP_Bool text_only);
 };
+/**
+ * @}
+ */
 
 #endif  /* PPAPI_C_DEV_PPP_ZOOM_DEV_H_ */