Automated test for dragging between same-page, cross-site frames.

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 424 matching lines @@
 
   ~DOMMessageQueue() override;
 
   // Removes all messages in the message queue.
   void ClearQueue();
 
   // Wait for the next message to arrive. |message| will be set to the next
   // message. Returns true on success.
   bool WaitForMessage(std::string* message) WARN_UNUSED_RESULT;
 
+  // If there is a message in the queue, then copies it to |message| and returns
+  // true.  Otherwise (if the queue is empty), returns false.
+  bool PopMessage(std::string* message) WARN_UNUSED_RESULT;
+
   // Overridden NotificationObserver methods.
   void Observe(int type,
                const NotificationSource& source,
                const NotificationDetails& details) override;
 
   // Overridden WebContentsObserver methods.
   void RenderProcessGone(base::TerminationStatus status) override;
 
  private:
   NotificationRegistrar registrar_;
@@ skipping 296 matching lines @@
 
  private:
   PwnMessageHelper();  // Not instantiable.
 
   DISALLOW_COPY_AND_ASSIGN(PwnMessageHelper);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_BROWSER_TEST_UTILS_H_