wrench_menu: use NativeTheme colors under aura

chrome/browser/ui/libgtk2ui/native_theme_gtk2.cc

Index: chrome/browser/ui/libgtk2ui/native_theme_gtk2.cc
diff --git a/chrome/browser/ui/libgtk2ui/native_theme_gtk2.cc b/chrome/browser/ui/libgtk2ui/native_theme_gtk2.cc
index 6fbe3c268d68b0dbb57e45ae1ec56b0d88ef4163..b9105421da54e1c5732d3684637390c7241e2842 100644
--- a/chrome/browser/ui/libgtk2ui/native_theme_gtk2.cc
+++ b/chrome/browser/ui/libgtk2ui/native_theme_gtk2.cc
@@ -146,6 +146,8 @@ GdkColor NativeThemeGtk2::GetSystemGdkColor(ColorId color_id) const {
     // will require careful threading through existing menu code though.
     case kColorId_FocusedMenuItemBackgroundColor:
       return GetMenuItemStyle()->bg[GTK_STATE_SELECTED];
+    case kColorId_HotMenuItemBackgroundColor:
+      return GetMenuItemStyle()->bg[GTK_STATE_PRELIGHT];
     case kColorId_MenuBorderColor:
     case kColorId_MenuSeparatorColor: {
       return GetMenuItemStyle()->text[GTK_STATE_INSENSITIVE];
@@ -171,7 +173,7 @@ GdkColor NativeThemeGtk2::GetSystemGdkColor(ColorId color_id) const {
     case kColorId_TextButtonHighlightColor:
       return GetButtonStyle()->base[GTK_STATE_SELECTED];
     case kColorId_TextButtonHoverColor:
-      return GetButtonStyle()->text[GTK_STATE_NORMAL];
+      return GetButtonStyle()->text[GTK_STATE_PRELIGHT];
 
     // Textfield
     case kColorId_TextfieldDefaultColor: