Fixing a possible NULL pointer dereference in NativeWidgetAura.

ui/views/widget/native_widget_aura.cc

Index: ui/views/widget/native_widget_aura.cc
diff --git a/ui/views/widget/native_widget_aura.cc b/ui/views/widget/native_widget_aura.cc
index b436c8eeeb13e64bcf76829b8827521254693b5f..b757530e6270939f1a45f4e68790e185bfea04d4 100644
--- a/ui/views/widget/native_widget_aura.cc
+++ b/ui/views/widget/native_widget_aura.cc
@@ -860,7 +860,10 @@ void NativeWidgetAura::OnKeyEvent(ui::KeyEvent* event) {
   // and the window may be invisible by that time.
   if (!window_->IsVisible())
     return;
-  GetWidget()->GetInputMethod()->DispatchKeyEvent(*event);
+  InputMethod* input_method = GetWidget()->GetInputMethod();
+  if (!input_method)
+    return;
+  input_method->DispatchKeyEvent(*event);
   if (switches::IsTextInputFocusManagerEnabled()) {
     FocusManager* focus_manager = GetWidget()->GetFocusManager();
     delegate_->OnKeyEvent(event);