Clang plugin to check that unstable types are not used in IPC.

tools/clang/plugins/Options.h

Index: tools/clang/plugins/Options.h
diff --git a/tools/clang/plugins/Options.h b/tools/clang/plugins/Options.h
index bb5857f0d74ec688dc158367b24b0a1c7643d4c2..e6fc93e32dcc980d601df861c9b0f8ae96ea94ad 100644
--- a/tools/clang/plugins/Options.h
+++ b/tools/clang/plugins/Options.h
@@ -14,7 +14,8 @@ struct Options {
         enforce_in_thirdparty_webkit(false),
         check_enum_last_value(false),
         with_ast_visitor(false),
-        check_templates(false) {}
+        check_templates(false),
+        check_ipc(false) {}
 
   bool check_base_classes;
   bool enforce_in_pdf;
@@ -23,6 +24,7 @@ struct Options {
   bool with_ast_visitor;
   bool check_templates;
   bool follow_macro_expansion = false;
+  bool check_ipc;
 };
 
 }  // namespace chrome_checker