IPC Fuzzer: Minor fuzz traits updates.

R=inferno@chromium.org
BUG=450268

Review URL: https://codereview.chromium.org/1076453003

Cr-Commit-Position: refs/heads/master@{#324296}

tools/ipc_fuzzer/fuzzer/fuzzer.cc

@@ -1274,6 +1274,20 @@ struct FuzzTraits<GURL> {
   }
 };
 
+template <>
+struct FuzzTraits<HostID> {
+  static bool Fuzz(HostID* p, Fuzzer* fuzzer) {
+    HostID::HostType type = p->type();
+    std::string id = p->id();
+    if (!FuzzParam(&type, fuzzer))
+      return false;
+    if (!FuzzParam(&id, fuzzer))
+      return false;
+    *p = HostID(type, id);
+    return true;
+  }
+};
+
 #if defined(OS_WIN)
 template <>
 struct FuzzTraits<HWND> {

tools/ipc_fuzzer/message_lib/all_messages.h

@@ -9,6 +9,7 @@
 // Force all multi-include optional files to be included again.
 #undef CHROME_COMMON_COMMON_PARAM_TRAITS_MACROS_H_
 #undef COMPONENTS_AUTOFILL_CONTENT_COMMON_AUTOFILL_PARAM_TRAITS_MACROS_H_
+#undef COMPONENTS_NACL_COMMON_NACL_TYPES_PARAM_TRAITS_H_
 #undef CONTENT_COMMON_CONTENT_PARAM_TRAITS_MACROS_H_
 #undef CONTENT_COMMON_FRAME_PARAM_MACROS_H_
 #undef CONTENT_PUBLIC_COMMON_COMMON_PARAM_TRAITS_MACROS_H_