text input focus: Supports Window::GetFocusedTextInputClient.

ui/aura/window.cc

 // Copyright (c) 2012 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.
 
 #include "ui/aura/window.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 629 matching lines @@
 // static
 void Window::ConvertRectToTarget(const Window* source,
                                  const Window* target,
                                  gfx::Rect* rect) {
   DCHECK(rect);
   gfx::Point origin = rect->origin();
   ConvertPointToTarget(source, target, &origin);
   rect->set_origin(origin);
 }
 
+ui::TextInputClient* Window::GetFocusedTextInputClient() {
+  return delegate_ ? delegate_->GetFocusedTextInputClient() : nullptr;
+}
+
 void Window::MoveCursorTo(const gfx::Point& point_in_window) {
   Window* root_window = GetRootWindow();
   DCHECK(root_window);
   gfx::Point point_in_root(point_in_window);
   ConvertPointToTarget(this, root_window, &point_in_root);
   root_window->GetHost()->MoveCursorTo(point_in_root);
 }
 
 gfx::NativeCursor Window::GetCursor(const gfx::Point& point) const {
   return delegate_ ? delegate_->GetCursor(point) : gfx::kNullCursor;
@@ skipping 800 matching lines @@
       return window;
     if (offset)
       *offset += window->bounds().OffsetFromOrigin();
   }
   if (offset)
     *offset = gfx::Vector2d();
   return NULL;
 }
 
 }  // namespace aura