Disable pinch-to-zoom gesture on virtual keyboard

ui/keyboard/keyboard_controller.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 UI_KEYBOARD_KEYBOARD_CONTROLLER_H_
 #define UI_KEYBOARD_KEYBOARD_CONTROLLER_H_
 
 #include <memory>
 
 #include "base/event_types.h"
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "ui/aura/window_observer.h"
 #include "ui/base/ime/input_method_observer.h"
 #include "ui/base/ime/text_input_type.h"
 #include "ui/gfx/geometry/rect.h"
+#include "ui/keyboard/keyboard_event_filter.h"
 #include "ui/keyboard/keyboard_export.h"
 #include "ui/keyboard/keyboard_layout_delegate.h"
 
 namespace aura {
 class Window;
 }
 namespace ui {
 class InputMethod;
 class TextInputClient;
 }
@@ skipping 143 matching lines @@
   // uses container_'s animator.
   std::unique_ptr<CallbackAnimationObserver> animation_observer_;
 
   ui::InputMethod* input_method_;
   bool keyboard_visible_;
   bool show_on_resize_;
   // If true, the keyboard is always visible even if no window has input focus.
   bool keyboard_locked_;
   KeyboardMode keyboard_mode_;
   ui::TextInputType type_;
+  KeyboardEventFilter event_filter_;

[bshe, 2017/01/31 16:39:25]

nit: consider use a unique_ptr

[oshima, 2017/01/31 21:06:53]

this is actually fine if the lifetime is same as owning class.

 
   base::ObserverList<KeyboardControllerObserver> observer_list_;
 
   // The currently used keyboard position.
   gfx::Rect current_keyboard_bounds_;
 
   static KeyboardController* instance_;
 
   base::WeakPtrFactory<KeyboardController> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(KeyboardController);
 };
 
 }  // namespace keyboard
 
 #endif  // UI_KEYBOARD_KEYBOARD_CONTROLLER_H_