Notify normalizing input filters on blur.

remoting/protocol/input_event_tracker.h

 // 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.
 
 #ifndef REMOTING_PROTOCOL_INPUT_EVENT_TRACKER_H_
 #define REMOTING_PROTOCOL_INPUT_EVENT_TRACKER_H_
 
 #include <stdint.h>
 
 #include <set>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "remoting/protocol/input_stub.h"
 #include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
 #include "ui/events/keycodes/dom/dom_code.h"
 
 namespace remoting {
 namespace protocol {
 
 // Filtering InputStub which tracks mouse and keyboard input events before
 // passing them on to |input_stub|, and can dispatch release events to
 // |input_stub| for all currently-pressed keys and buttons when necessary.
 class InputEventTracker : public InputStub {
  public:
-  explicit InputEventTracker(protocol::InputStub* input_stub);
+  InputEventTracker();
+  explicit InputEventTracker(InputStub* input_stub);
   ~InputEventTracker() override;
 
+  void set_input_stub(InputStub* input_stub) {
+    input_stub_ = input_stub;
+  }
+
   // Returns true if the key with the specified USB code is currently pressed.
   bool IsKeyPressed(ui::DomCode usb_keycode) const;
 
   // Returns the count of keys currently pressed.
   int PressedKeyCount() const;
 
   // Dispatch release events for all currently-pressed keys, mouse buttons, and
   // touch points to the InputStub.
   void ReleaseAll();
 
   // Similar to ReleaseAll, but conditional on a modifier key tracked by this
   // class being pressed without the corresponding parameter indicating that it
   // should be.
   void ReleaseAllIfModifiersStuck(bool alt_expected, bool ctrl_expected,
                                   bool os_expected, bool shift_expected);
 
   // InputStub interface.
   void InjectKeyEvent(const KeyEvent& event) override;
   void InjectTextEvent(const TextEvent& event) override;
   void InjectMouseEvent(const MouseEvent& event) override;
   void InjectTouchEvent(const TouchEvent& event) override;
 
  private:
-  protocol::InputStub* input_stub_;
+  InputStub* input_stub_ = nullptr;
 
   std::set<ui::DomCode> pressed_keys_;
 
   webrtc::DesktopVector mouse_pos_;
-  uint32_t mouse_button_state_;
+  uint32_t mouse_button_state_ = 0;
 
   std::set<uint32_t> touch_point_ids_;
 
   DISALLOW_COPY_AND_ASSIGN(InputEventTracker);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_INPUT_EVENT_TRACKER_H_