Implement link selection on alt+mouse drag.

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

 /*
  * 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 12 matching lines @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "platform/testing/UnitTestHelpers.h"
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "platform/SharedBuffer.h"
+#include "platform/Timer.h"
 #include "public/platform/FilePathConversion.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebString.h"
 #include "public/platform/WebTaskRunner.h"
 #include "public/platform/WebThread.h"
 #include "public/platform/WebTraceLocation.h"
 #include "public/platform/WebUnitTestSupport.h"
 #include "wtf/text/StringUTF8Adaptor.h"
 
 namespace blink {
 namespace testing {
 
 void runPendingTasks()
 {
     Platform::current()->currentThread()->getWebTaskRunner()->postTask(BLINK_FROM_HERE, bind(&exitRunLoop));
     enterRunLoop();
 }
 
+struct QuitTask {
+    void timerFired(Timer<QuitTask>*)
+    {
+        // We cannot just exit loop here, because we may be halfway through the task queue.
+        Platform::current()->currentThread()->getWebTaskRunner()->postTask(BLINK_FROM_HERE, bind(&exitRunLoop));
+    }
+};
+
+void waitForDeferredTasks(double interval)
+{
+    // Pending tasks include Timers that have been scheduled.
+    Timer<QuitTask> quitOnTimeout(new QuitTask, &QuitTask::timerFired);
+    quitOnTimeout.startOneShot(interval, BLINK_FROM_HERE);
+    testing::enterRunLoop();
+}
+
 String blinkRootDir()
 {
     base::FilePath path;
     base::PathService::Get(base::DIR_SOURCE_ROOT, &path);
     path = path.Append(FILE_PATH_LITERAL("third_party/WebKit"));
     path = base::MakeAbsoluteFilePath(path);
     return String::fromUTF8(path.MaybeAsASCII().c_str());
 }
 
 PassRefPtr<SharedBuffer> readFromFile(const String& path)
@@ skipping 14 matching lines @@
     base::MessageLoop::current()->QuitWhenIdle();
 }
 
 void yieldCurrentThread()
 {
     base::PlatformThread::YieldCurrentThread();
 }
 
 } // namespace testing
 } // namespace blink