MacViews: Implement Force Touch/Mac dictionary lookup for Textfields.

ui/views/view.cc

Index: ui/views/view.cc
diff --git a/ui/views/view.cc b/ui/views/view.cc
index 847f807f356b944d275b238348bdb7db88b62032..d4ecbebafcdc2ef45a6436caa119fea3e147b64b 100644
--- a/ui/views/view.cc
+++ b/ui/views/view.cc
@@ -921,6 +921,15 @@ View* View::GetTooltipHandlerForPoint(const gfx::Point& point) {
   return this;
 }
 
+const gfx::RenderText* View::GetRenderText() const {
+  return nullptr;
+}
+
+gfx::RenderText* View::GetRenderText() {
+  return const_cast<gfx::RenderText*>(
+      const_cast<const View*>(this)->GetRenderText());
+}
+
 gfx::NativeCursor View::GetCursor(const ui::MouseEvent& event) {
 #if defined(OS_WIN)
   static ui::Cursor arrow;