Fix cropped floating gesture candidate window

ui/keyboard/content/keyboard_ui_content.h

Index: ui/keyboard/content/keyboard_ui_content.h
diff --git a/ui/keyboard/content/keyboard_ui_content.h b/ui/keyboard/content/keyboard_ui_content.h
index 1c6fc25e00de8c7f9dd347565f81b318f62e16c5..af45c12a8b56cc940937459f42b197b7bec51bb3 100644
--- a/ui/keyboard/content/keyboard_ui_content.h
+++ b/ui/keyboard/content/keyboard_ui_content.h
@@ -72,6 +72,7 @@ class KEYBOARD_EXPORT KeyboardUIContent : public KeyboardUI,
   // Overridden from KeyboardUI:
   aura::Window* GetKeyboardWindow() override;
   bool HasKeyboardWindow() const override;
+  bool ShouldWindowOverscroll(aura::Window* window) const override;
   void ReloadKeyboardIfNeeded() override;
   void InitInsets(const gfx::Rect& new_bounds) override;
   void ResetInsets() override;
@@ -91,6 +92,8 @@ class KEYBOARD_EXPORT KeyboardUIContent : public KeyboardUI,
 
   content::BrowserContext* browser_context() { return browser_context_; }
 
+  const aura::Window* GetKeyboardRootWindow() const;
+
  private:
   friend class TestApi;
 
@@ -124,4 +127,4 @@ class KEYBOARD_EXPORT KeyboardUIContent : public KeyboardUI,
 
 }  // namespace keyboard
 
-#endif  // UI_KEYBOARD_CONTENT_KEYBOARD_UI_CONTENT_H_
+#endif  // UI_KEYBOARD_CONTENT_KEYBOARD_UI_CONTENT_H_