(re-)enable prerender unit tests on win_aura

chrome/browser/prerender/prerender_unittest.cc

Index: chrome/browser/prerender/prerender_unittest.cc
diff --git a/chrome/browser/prerender/prerender_unittest.cc b/chrome/browser/prerender/prerender_unittest.cc
index cacce16e97f0e6cbac65bea44d3ccb0848a5594a..b530a2874eee902997b53ea0819d2c99c6f65258 100644
--- a/chrome/browser/prerender/prerender_unittest.cc
+++ b/chrome/browser/prerender/prerender_unittest.cc
@@ -330,8 +330,6 @@ class PrerenderTest : public testing::Test {
   int last_prerender_id_;
 };
 
-// TODO(scottmg): http://crbug.com/128578
-#if !(defined(OS_WIN) && defined(USE_AURA))
 TEST_F(PrerenderTest, FoundTest) {
   GURL url("http://www.google.com/");
   DummyPrerenderContents* prerender_contents =
@@ -1198,6 +1196,4 @@ TEST_F(PrerenderTest, LinkManagerCancelThenAddAgain) {
   EXPECT_FALSE(IsEmptyPrerenderLinkManager());
 }
 
-#endif  // !(defined(OS_WIN) && defined(USE_AURA))
-
 }  // namespace prerender