Use macros to define pepper interfaces

ppapi/proxy/ppb_var_deprecated_proxy.h

Index: ppapi/proxy/ppb_var_deprecated_proxy.h
diff --git a/ppapi/proxy/ppb_var_deprecated_proxy.h b/ppapi/proxy/ppb_var_deprecated_proxy.h
index d1a45a0e86e06d7bc3957b838dd482e02e6282d1..ac8c1fd68eb37205f72464a6aa12143e7266ba4c 100644
--- a/ppapi/proxy/ppb_var_deprecated_proxy.h
+++ b/ppapi/proxy/ppb_var_deprecated_proxy.h
@@ -26,16 +26,11 @@ class SerializedVarReturnValue;
 
 class PPB_Var_Deprecated_Proxy : public InterfaceProxy {
  public:
-  PPB_Var_Deprecated_Proxy(Dispatcher* dispatcher,
-                           const void* target_interface);
+  PPB_Var_Deprecated_Proxy(Dispatcher* dispatcher);
   virtual ~PPB_Var_Deprecated_Proxy();
 
   static const Info* GetInfo();
 
-  const PPB_Var_Deprecated* ppb_var_target() const {
-    return static_cast<const PPB_Var_Deprecated*>(target_interface());
-  }
-
   // InterfaceProxy implementation.
   virtual bool OnMessageReceived(const IPC::Message& msg);
 
@@ -96,6 +91,10 @@ class PPB_Var_Deprecated_Proxy : public InterfaceProxy {
 
   void DoReleaseObject(int64 object_id);
   ScopedRunnableMethodFactory<PPB_Var_Deprecated_Proxy> task_factory_;
+
+  const PPB_Var_Deprecated* ppb_var_impl_;
+
+  DISALLOW_COPY_AND_ASSIGN(PPB_Var_Deprecated_Proxy);
 };
 
 }  // namespace proxy