Implement link selection on alt+mouse drag.

third_party/WebKit/Source/platform/testing/UnitTestHelpers.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 18 matching lines @@
 #include "wtf/PassRefPtr.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class SharedBuffer;
 
 namespace testing {
 
 void runPendingTasks();
+void waitForDeferredTasks(double interval);

[kotenkov, 2016/03/09 17:27:59]

This is needed for the tests regarding cursors -- they are updated on timer, so
we need a means to wait for them.
This is not inside a test file because it may be needed in some other test. In
fact it is used in some our internal tests at Yandex.

[yosin_UTC9, 2016/03/10 01:40:48]

Could you put an explanation as comment in .h file to improve code
documentation?
With unit of |interval|, is it seconds or milliseconds?

 
 String blinkRootDir();
 
 PassRefPtr<SharedBuffer> readFromFile(const String& path);
 
 void enterRunLoop();
 void exitRunLoop();
 
 void yieldCurrentThread();
 
 } // namespace testing
 } // namespace blink
 
 #endif