text input focus: Supports Window::GetFocusedTextInputClient.

content/browser/web_contents/aura/image_window_delegate.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_WEB_CONTENTS_AURA_IMAGE_WINDOW_DELEGATE_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_AURA_IMAGE_WINDOW_DELEGATE_H_
 
 #include "content/common/content_export.h"
 #include "ui/aura/window_delegate.h"
 #include "ui/gfx/geometry/size.h"
@@ skipping 11 matching lines @@
   bool has_image() const { return !image_.IsEmpty(); }
 
  protected:
   ~ImageWindowDelegate() override;
 
   // Overridden from aura::WindowDelegate:
   gfx::Size GetMinimumSize() const override;
   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(
       aura::Window* child,
       const gfx::Point& location) override;
   bool CanFocus() override;
   void OnCaptureLost() override;
   void OnPaint(gfx::Canvas* canvas) override;
   void OnDeviceScaleFactorChanged(float device_scale_factor) override;
   void OnWindowDestroying(aura::Window* window) override;
@@ skipping 10 matching lines @@
   // the image size is smaller than the window size, then the delegate paints a
   // white background for the missing regions.
   bool size_mismatch_;
 
   DISALLOW_COPY_AND_ASSIGN(ImageWindowDelegate);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_AURA_IMAGE_WINDOW_DELEGATE_H_