Fix crash around Reset function call.

chrome/browser/chromeos/input_method/ibus_controller_impl.cc

Index: chrome/browser/chromeos/input_method/ibus_controller_impl.cc
diff --git a/chrome/browser/chromeos/input_method/ibus_controller_impl.cc b/chrome/browser/chromeos/input_method/ibus_controller_impl.cc
index 13e4f947d64f411e195475ebbbb97605e0c3ca36..7a2d7cf10e44ce26e5212a0433963b75d58c0c7f 100644
--- a/chrome/browser/chromeos/input_method/ibus_controller_impl.cc
+++ b/chrome/browser/chromeos/input_method/ibus_controller_impl.cc
@@ -246,7 +246,9 @@ void IBusControllerImpl::Reset() {
     return;
   IBusInputContextClient* client
       = DBusThreadManager::Get()->GetIBusInputContextClient();
-  if (client)
+  // We don't need to call Reset if there is no on-going input context, because
+  // the input context will be reset at initialization.
+  if (client && client->IsObjectProxyReady())
     client->Reset();
 }