MacViews: Enable word lookup for selectable views::Labels and multi-line text.

ui/views/controls/label.cc

Index: ui/views/controls/label.cc
diff --git a/ui/views/controls/label.cc b/ui/views/controls/label.cc
index 9b04c091ff1ab436580068f0d8a18cb0e9526562..a047acbd51c35cdec04f00955df331f2eda11563 100644
--- a/ui/views/controls/label.cc
+++ b/ui/views/controls/label.cc
@@ -395,6 +395,10 @@ bool Label::CanProcessEventsWithinSubtree() const {
   return !!GetRenderTextForSelectionController();
 }
 
+WordLookupClient* Label::GetWordLookupClient() {
+  return this;
+}
+
 void Label::GetAccessibleNodeData(ui::AXNodeData* node_data) {
   node_data->role = ui::AX_ROLE_STATIC_TEXT;
   node_data->AddStateFlag(ui::AX_STATE_READ_ONLY);
@@ -633,6 +637,16 @@ void Label::ShowContextMenuForView(View* source,
       source_type));
 }
 
+bool Label::GetDecoratedWordAtPoint(const gfx::Point& point,
+                                    gfx::DecoratedText* decorated_word,
+                                    gfx::Point* baseline_point) {
+  gfx::RenderText* render_text = GetRenderTextForSelectionController();
+  return render_text
+             ? render_text->GetDecoratedWordAtPoint(point, decorated_word,
+                                                    baseline_point)
+             : false;
+}
+
 gfx::RenderText* Label::GetRenderTextForSelectionController() {
   return const_cast<gfx::RenderText*>(
       static_cast<const Label*>(this)->GetRenderTextForSelectionController());