Add wtf_unittests target that links unit tests outside DLL

Source/wtf/tests/RunAllTests.cpp

Index: Source/wtf/tests/RunAllTests.cpp
diff --git a/Source/core/loader/UniqueIdentifier.cpp b/Source/wtf/tests/RunAllTests.cpp
similarity index 82%
copy from Source/core/loader/UniqueIdentifier.cpp
copy to Source/wtf/tests/RunAllTests.cpp
index 0ad56563e3e214a67acd8c53decb085ad4250cb9..b35160810475ffeaea6aeb76e7dcfebb968dce05 100644
--- a/Source/core/loader/UniqueIdentifier.cpp
+++ b/Source/wtf/tests/RunAllTests.cpp
@@ -28,17 +28,20 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#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();
+}