Implement the gamepad API in the IPC proxy

ppapi/proxy/dispatch_reply_message.h

 // Copyright (c) 2012 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.
 
 // This file provides infrastructure for dispatching host resource reply
 // messages. Normal IPC Reply handlers can't take extra parameters.
 // We want to take a ResourceMessageReplyParams as a parameter.
 
 #ifndef PPAPI_PROXY_DISPATCH_REPLY_MESSAGE_H_
 #define PPAPI_PROXY_DISPATCH_REPLY_MESSAGE_H_
@@ skipping 45 matching lines @@
 
 template<class ObjT, class Method, class A, class B, class C, class D, class E>
 inline void DispatchResourceReply(ObjT* obj, Method method,
                                   const ResourceMessageReplyParams& params,
                                   const Tuple5<A, B, C, D, E>& arg) {
   return (obj->*method)(params, arg.a, arg.b, arg.c, arg.d, arg.e);
 }
 
 #define PPAPI_DISPATCH_RESOURCE_REPLY(msg_class, member_func) \
     case msg_class::ID: { \
-        TRACK_RUN_IN_IPC_HANDLER(member_func); \
-        msg_class::Schema::Param p; \
-        if (msg_class::Read(&ipc_message__, &p)) { \
-          ppapi::proxy::DispatchResourceReply( \
-              this, \
-              &_IpcMessageHandlerClass::member_func, \
-              params, p); \
-        }  \
+      TRACK_RUN_IN_IPC_HANDLER(member_func); \
+      msg_class::Schema::Param p; \
+      if (msg_class::Read(&ipc_message__, &p)) { \
+        ppapi::proxy::DispatchResourceReply( \
+            this, \
+            &_IpcMessageHandlerClass::member_func, \
+            params, p); \
       }  \
-      break;
+      break; \
+    }
+
+#define PPAPI_DISPATCH_RESOURCE_REPLY_0(msg_class, member_func) \
+    case msg_class::ID: { \
+      TRACK_RUN_IN_IPC_HANDLER(member_func); \
+      member_func(params); \
+      break; \
+    }
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_DISPATCH_REPLY_MESSAGE_H_