Implement the gamepad API in the IPC proxy

ppapi/host/dispatch_host_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 call
 // messages. Normal IPC message handlers can't take extra parameters or
 // return values. We want to take a HostMessageContext as a parameter and
 // also return the int32_t return value to the caller.
 
 #ifndef PPAPI_HOST_DISPATCH_HOST_MESSAGE_H_
@@ skipping 61 matching lines @@
         return ppapi::host::DispatchResourceCall( \
             this, \
             &_IpcMessageHandlerClass::member_func, \
             context, p); \
       } \
       return PP_ERROR_FAILED; \
     }
 
 #define PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(msg_class, member_func) \
   case msg_class::ID: { \
-      TRACK_RUN_IN_IPC_HANDLER(member_func); \
-      return member_func(context); \
-    }
-
+    TRACK_RUN_IN_IPC_HANDLER(member_func); \
+    return member_func(context); \
+  }
 
 }  // namespace host
 }  // namespace ppapi
 
 #endif  // PPAPI_HOST_DISPATCH_HOST_MESSAGE_H_