Delay Input.dispatchKeyEvent response until after key event ack.

content/public/test/browser_test_utils.h

Index: content/public/test/browser_test_utils.h
diff --git a/content/public/test/browser_test_utils.h b/content/public/test/browser_test_utils.h
index 9f04c0660c33aa58c14c9cf06eff1b445f84c1f6..51056018959d1f3fc83ade015839e1b4274dd75a 100644
--- a/content/public/test/browser_test_utils.h
+++ b/content/public/test/browser_test_utils.h
@@ -551,6 +551,8 @@ class InputMsgWatcher : public BrowserMessageFilter {
   InputMsgWatcher(RenderWidgetHost* render_widget_host,
                   blink::WebInputEvent::Type type);
 
+  bool HasReceivedAck();

[dtapuska, 2016/11/21 14:49:45]

should be const

[samuong, 2016/11/21 18:05:34]

Done.

+
   // Wait until ack message occurs, returning the ack result from
   // the message.
   uint32_t WaitForAck();