use variadic macros/templates in IPC message implementation

content/renderer/input/input_event_filter.cc

Index: content/renderer/input/input_event_filter.cc
diff --git a/content/renderer/input/input_event_filter.cc b/content/renderer/input/input_event_filter.cc
index 064768579bde6eea6636cf981fd035d3485de7bf..20c6df75b2be59829d1b311b0b860083c8f2abc2 100644
--- a/content/renderer/input/input_event_filter.cc
+++ b/content/renderer/input/input_event_filter.cc
@@ -24,8 +24,9 @@ using blink::WebInputEvent;
 
 #include "ipc/ipc_message_null_macros.h"
 #undef IPC_MESSAGE_DECL
-#define IPC_MESSAGE_DECL(kind, type, name, in, out, ilist, olist) \
-  case name::ID: return #name;
+#define IPC_MESSAGE_DECL(name, ...) \
+  case name::ID:                    \
+    return #name;
 
 const char* GetInputMessageTypeName(const IPC::Message& message) {
   switch (message.type()) {