Add per-tab "JavaScript enabled" preference.

chrome/browser/prefs/overlay_user_pref_store_unittest.cc

Index: chrome/browser/prefs/overlay_user_pref_store_unittest.cc
diff --git a/chrome/browser/prefs/overlay_user_pref_store_unittest.cc b/chrome/browser/prefs/overlay_user_pref_store_unittest.cc
index 2f082453bcdf5e1aeb5b800e6cc7ab5ddab2598f..f9e36a0d0080fa3e0a117b714c6cf935ac606793 100644
--- a/chrome/browser/prefs/overlay_user_pref_store_unittest.cc
+++ b/chrome/browser/prefs/overlay_user_pref_store_unittest.cc
@@ -17,10 +17,8 @@ namespace {
 
 const char* overlay_key = prefs::kBrowserWindowPlacement;
 const char* regular_key = prefs::kShowBookmarkBar;
-// There is no real-life sense in mapping these two properties, it for test
-// purposes only.
 const char* mapped_overlay_key = prefs::kWebKitJavascriptEnabled;
-const char* mapped_underlay_key = prefs::kWebKitJavaEnabled;
+const char* mapped_underlay_key = prefs::kWebKitGlobalJavascriptEnabled;
 
 }  // namespace