Removed Doxygen groupings by ppb_, pp_, and ppp_. Added grouping by construct...

ppapi/c/ppp_instance.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.
  */
 #ifndef PPAPI_C_PPP_INSTANCE_H_
 #define PPAPI_C_PPP_INSTANCE_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_rect.h"
 #include "ppapi/c/pp_resource.h"
 
 struct PP_InputEvent;
 struct PP_Var;
 
 #define PPP_INSTANCE_INTERFACE "PPP_Instance;0.4"
 
 /**
  * @file
  * Defines the API ...
  *
- * @addtogroup PPP
+ * @addtogroup Interfaces
  * @{
  */
 
 struct PPP_Instance {
   /**
    * Called when a new plugin is instantiated on the web page. The identifier
    * of the new instance will be passed in as the first argument (this value is
    * generated by the browser and is an opaque handle).
    *
    * It's possible for more than one plugin instance to be created within the
@@ skipping 86 matching lines @@
    * this will be a PPP_Class object that exposes certain methods the page
    * may want to call.
    *
    * On Failure, the returned var should be a "void" var.
    *
    * The returned PP_Var should have a reference added for the caller, which
    * will be responsible for Release()ing that reference.
    */
   struct PP_Var (*GetInstanceObject)(PP_Instance instance);
 };
-
 /**
  * @}
- * End addtogroup PPP
  */
+
 #endif  /* PPAPI_C_PPP_INSTANCE_H_ */