text input focus: Supports Window::GetFocusedTextInputClient.

ui/aura/test/test_window_delegate.h

Index: ui/aura/test/test_window_delegate.h
diff --git a/ui/aura/test/test_window_delegate.h b/ui/aura/test/test_window_delegate.h
index 138d78bf5481859a0c180692af3de95175d68099..1f1b722d7282356784c60b9b48943df3ec3d3ab1 100644
--- a/ui/aura/test/test_window_delegate.h
+++ b/ui/aura/test/test_window_delegate.h
@@ -10,6 +10,7 @@
 #include "base/compiler_specific.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/aura/window_delegate.h"
+#include "ui/base/ime/dummy_text_input_client.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/gfx/geometry/rect.h"
 
@@ -46,6 +47,7 @@ class TestWindowDelegate : public WindowDelegate {
   gfx::Size GetMaximumSize() const override;
   void OnBoundsChanged(const gfx::Rect& old_bounds,
                        const gfx::Rect& new_bounds) override;
+  ui::TextInputClient* GetFocusedTextInputClient() override;
   gfx::NativeCursor GetCursor(const gfx::Point& point) override;
   int GetNonClientComponent(const gfx::Point& point) const override;
   bool ShouldDescendIntoChildForEventHandling(
@@ -66,6 +68,7 @@ class TestWindowDelegate : public WindowDelegate {
   bool delete_on_destroyed_;
   gfx::Size minimum_size_;
   gfx::Size maximum_size_;
+  ui::DummyTextInputClient text_input_client_;
   bool can_focus_;
 
   DISALLOW_COPY_AND_ASSIGN(TestWindowDelegate);