Fix cropped floating gesture candidate window

chrome/browser/ui/ash/chrome_keyboard_ui.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 CHROME_BROWSER_UI_ASH_CHROME_KEYBOARD_UI_H_
 #define CHROME_BROWSER_UI_ASH_CHROME_KEYBOARD_UI_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/public/browser/web_contents_observer.h"
@@ skipping 19 matching lines @@
 }
 
 // Subclass of KeyboardUIContent. It is used by KeyboardController to get
 // access to the virtual keyboard window and setup Chrome extension functions.
 class ChromeKeyboardUI : public keyboard::KeyboardUIContent,
                          public content::WebContentsObserver {
  public:
   explicit ChromeKeyboardUI(content::BrowserContext* context);
   ~ChromeKeyboardUI() override;
 
+  // keyboard::KeyboardUIContent overrides
+  bool ShouldWindowOverscroll(aura::Window* window) const override;
+
  private:
   // keyboard::KeyboardControllerProxy overrides
   ui::InputMethod* GetInputMethod() override;
   void RequestAudioInput(
       content::WebContents* web_contents,
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback) override;
   void SetupWebContents(content::WebContents* contents) override;
   void SetController(keyboard::KeyboardController* controller) override;
   void ShowKeyboardContainer(aura::Window* container) override;
 
   // The overridden implementation dispatches
   // chrome.virtualKeyboardPrivate.onTextInputBoxFocused event to extension to
   // provide the input type information. Naturally, when the virtual keyboard
   // extension is used as an IME then chrome.input.ime.onFocus provides the
   // information, but not when the virtual keyboard is used in conjunction with
   // another IME. virtualKeyboardPrivate.onTextInputBoxFocused is the remedy in
   // that case.
   void SetUpdateInputType(ui::TextInputType type) override;
 
   // content::WebContentsObserver overrides
   void RenderViewCreated(content::RenderViewHost* render_view_host) override;
 
   scoped_ptr<keyboard::KeyboardControllerObserver> observer_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeKeyboardUI);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_CHROME_KEYBOARD_UI_H_