Run click to play tests on Win Aura since we have NPAPI plugins there.

chrome/browser/content_settings/content_settings_browsertest.cc

Index: chrome/browser/content_settings/content_settings_browsertest.cc
===================================================================
--- chrome/browser/content_settings/content_settings_browsertest.cc	(revision 232915)
+++ chrome/browser/content_settings/content_settings_browsertest.cc	(working copy)
@@ -288,7 +288,8 @@
       IsContentBlocked(CONTENT_SETTINGS_TYPE_COOKIES));
 }
 
-#if !defined(USE_AURA)  // No NPAPI plugins with Aura.
+// On Aura NPAPI only works on Windows.
+#if !defined(USE_AURA) || defined(OS_WIN)
 
 class ClickToPlayPluginTest : public ContentSettingsTest {
  public:
@@ -465,7 +466,7 @@
   EXPECT_EQ(expected_title, title_watcher.WaitAndGetTitle());
 }
 
-#endif  // !defined(USE_AURA)
+#endif  // !defined(USE_AURA) || defined(OS_WIN)
 
 #if defined(ENABLE_PLUGINS)