Add wtf_unittests target that links unit tests outside DLL

Source/wtf/tests/RunAllTests.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
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  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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-#include "config.h"
-#include "core/loader/UniqueIdentifier.h"
+#include "wtf/CurrentTime.h"
+#include "wtf/Threading.h"
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
 
-namespace WebCore {
-
-static unsigned long s_uniqueIdentifier = 0;
-
-unsigned long createUniqueIdentifier()
+static double CurrentTime()
 {
-    return ++s_uniqueIdentifier;
+    return 0.0;

[darin (slow to review), 2013/05/25 22:56:00]

Should there be an assertion that this is never called?  Or, how do we avoid
someone tripping over thinking CurrentTime() actually works?

 }
 
-} // namespace WebCore
-
+int main(int argc, char** argv)
+{
+    ::testing::InitGoogleMock(&argc, argv);
+    WTF::setCurrentTimeFunction(CurrentTime);
+    WTF::initializeThreading();
+    return RUN_ALL_TESTS();
+}