Reland of Delay Input.dispatchKeyEvent response until after key event ack.

content/public/test/browser_test_utils.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_TEST_BROWSER_TEST_UTILS_H_
 #define CONTENT_PUBLIC_TEST_BROWSER_TEST_UTILS_H_
 
 #include <queue>
 #include <string>
 #include <vector>
@@ skipping 538 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(MainThreadFrameObserver);
 };
 
 // Watches for an input msg to be consumed.
 class InputMsgWatcher : public BrowserMessageFilter {
  public:
   InputMsgWatcher(RenderWidgetHost* render_widget_host,
                   blink::WebInputEvent::Type type);
 
+  bool HasReceivedAck() const;
+
   // Wait until ack message occurs, returning the ack result from
   // the message.
   uint32_t WaitForAck();
 
   uint32_t last_event_ack_source() const { return ack_source_; }
 
  private:
   ~InputMsgWatcher() override;
 
   // Overridden BrowserMessageFilter methods.
@@ skipping 186 matching lines @@
 
  private:
   PwnMessageHelper();  // Not instantiable.
 
   DISALLOW_COPY_AND_ASSIGN(PwnMessageHelper);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_BROWSER_TEST_UTILS_H_