Restore screen work area after login

ui/keyboard/keyboard_controller_proxy.cc

 // 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.
 
 #include "ui/keyboard/keyboard_controller_proxy.h"
 
 #include "base/values.h"
 #include "content/public/browser/site_instance.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents.h"
@@ skipping 142 matching lines @@
         content::WebContents::CreateParams(context,
             content::SiteInstance::CreateForURL(context, GetValidUrl()))));
     keyboard_contents_->SetDelegate(new KeyboardContentsDelegate(this));
     SetupWebContents(keyboard_contents_.get());
     ReloadContents();
   }
 
   return keyboard_contents_->GetView()->GetNativeView();
 }
 
+bool KeyboardControllerProxy::HasKeyboardWindow() const {
+  return keyboard_contents_;
+}
+
 void KeyboardControllerProxy::ShowKeyboardContainer(aura::Window* container) {
   GetKeyboardWindow()->Show();
   container->Show();
 }
 
 void KeyboardControllerProxy::HideKeyboardContainer(aura::Window* container) {
   container->Hide();
   GetKeyboardWindow()->Hide();
 }
 
@@ skipping 11 matching lines @@
   }
 }
 
 void KeyboardControllerProxy::EnsureCaretInWorkArea() {
 }
 
 void KeyboardControllerProxy::SetupWebContents(content::WebContents* contents) {
 }
 
 }  // namespace keyboard