Mojo: Add NotifyBadMessage API

mojo/edk/embedder/embedder.h

Index: mojo/edk/embedder/embedder.h
diff --git a/mojo/edk/embedder/embedder.h b/mojo/edk/embedder/embedder.h
index 68c198b7067a1aa27eb914d12edc9abb6a34e72b..bd4da3d808bac979a5dda9d0847aecfbfe362bd3 100644
--- a/mojo/edk/embedder/embedder.h
+++ b/mojo/edk/embedder/embedder.h
@@ -44,6 +44,15 @@ MOJO_SYSTEM_IMPL_EXPORT void ChildProcessLaunched(
     ScopedPlatformHandle server_pipe,
     const std::string& child_token);
 
+// Called in the parent process for each child process that is launched.
+// |bad_message_callback| is called if the system is notified of a bad message
+// from this process via the |MojoNotifyBadMessage()| API.
+MOJO_SYSTEM_IMPL_EXPORT void ChildProcessLaunched(
+    base::ProcessHandle child_process,
+    ScopedPlatformHandle server_pipe,
+    const std::string& child_token,
+    const base::Closure& bad_message_callback);
+
 // Called in the parent process when a child process fails to launch.
 // Exactly one of ChildProcessLaunched() or ChildProcessLaunchFailed() must be
 // called per child process launch attempt.