Implement the gamepad API in the IPC proxy

ppapi/host/dispatch_host_message.h

Index: ppapi/host/dispatch_host_message.h
diff --git a/ppapi/host/dispatch_host_message.h b/ppapi/host/dispatch_host_message.h
index 9a3fae52e3721b59fa1c05a0e04d6ec94b26e0ee..b01a0ed9cee9cceae56d418ead3d070d8b161caf 100644
--- a/ppapi/host/dispatch_host_message.h
+++ b/ppapi/host/dispatch_host_message.h
@@ -79,10 +79,9 @@ inline int32_t DispatchResourceCall(ObjT* obj, Method method,
 
 #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