Views:: Make Labels support text selection.

ui/native_theme/native_theme_mac.mm

Index: ui/native_theme/native_theme_mac.mm
diff --git a/ui/native_theme/native_theme_mac.mm b/ui/native_theme/native_theme_mac.mm
index c6c79f7dc94eadfb475ba8917551248bc3398673..b5434a627750ac2232e72a958069f54ecc635403 100644
--- a/ui/native_theme/native_theme_mac.mm
+++ b/ui/native_theme/native_theme_mac.mm
@@ -154,6 +154,7 @@ SkColor ColorToGrayscale(SkColor color) {
     // background color for text selections. We honor that setting.
     // TODO(ellyjones): Listen for NSSystemColorsDidChangeNotification somewhere
     // and propagate it to the View hierarchy.
+    case kColorId_LabelTextSelectionBackgroundFocused:
     case kColorId_TextfieldSelectionBackgroundFocused:
       return NSSystemColorToSkColor([NSColor selectedTextBackgroundColor]);
     default:
@@ -193,6 +194,8 @@ SkColor ColorToGrayscale(SkColor color) {
       return NSSystemColorToSkColor([NSColor disabledControlTextColor]);
     case kColorId_ButtonHoverColor:
       return NSSystemColorToSkColor([NSColor selectedControlTextColor]);
+    case kColorId_LabelTextSelectionColor:
+      return NSSystemColorToSkColor([NSColor selectedTextColor]);
 
     // Link.
     case kColorId_LinkDisabled: