text input focus: Supports Window::GetFocusedTextInputClient.

ui/views/widget/widget.h

Index: ui/views/widget/widget.h
diff --git a/ui/views/widget/widget.h b/ui/views/widget/widget.h
index 510219cfdb286586b00d739c78ce8d09d806ae08..06bd49190c275cc2fd4b2356d3529048f71769d6 100644
--- a/ui/views/widget/widget.h
+++ b/ui/views/widget/widget.h
@@ -567,6 +567,9 @@ class VIEWS_EXPORT Widget : public internal::NativeWidgetDelegate,
   FocusManager* GetFocusManager();
   const FocusManager* GetFocusManager() const;
 
+  // Returns the focused text input client within this widget.
+  ui::TextInputClient* GetFocusedTextInputClient();
+
   // Returns the InputMethod for this widget.
   // Note that all widgets in a widget hierarchy share the same input method.
   InputMethod* GetInputMethod();