Use macros to define pepper interfaces

ppapi/proxy/ppb_char_set_proxy.h

Index: ppapi/proxy/ppb_char_set_proxy.h
diff --git a/ppapi/proxy/ppb_char_set_proxy.h b/ppapi/proxy/ppb_char_set_proxy.h
index af5cdc06f2363fe6c5ff668c733307a1f8c4694e..39ddc7bc68ec5e5e54a1f48cd3d4b7027fe40721 100644
--- a/ppapi/proxy/ppb_char_set_proxy.h
+++ b/ppapi/proxy/ppb_char_set_proxy.h
@@ -19,15 +19,12 @@ namespace proxy {
 
 class SerializedVarReturnValue;
 
-class PPB_CharSet_Proxy : public ppapi::FunctionGroupBase,
-                          public ppapi::thunk::PPB_CharSet_FunctionAPI,
-                          public InterfaceProxy {
+class PPB_CharSet_Proxy : public InterfaceProxy,
+                          public ppapi::thunk::PPB_CharSet_FunctionAPI {
  public:
-  PPB_CharSet_Proxy(Dispatcher* dispatcher, const void* target_interface);
+  PPB_CharSet_Proxy(Dispatcher* dispatcher);
   virtual ~PPB_CharSet_Proxy();
 
-  static const Info* GetInfo();
-
   // FunctionGroupBase overrides.
   virtual ppapi::thunk::PPB_CharSet_FunctionAPI* AsPPB_CharSet_FunctionAPI()
       OVERRIDE;
@@ -48,6 +45,8 @@ class PPB_CharSet_Proxy : public ppapi::FunctionGroupBase,
   // InterfaceProxy implementation.
   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
 
+  static const InterfaceID kInterfaceID = INTERFACE_ID_PPB_CHAR_SET;
+
  private:
   void OnMsgGetDefaultCharSet(PP_Instance instance,
                               SerializedVarReturnValue result);