Remove implementation of Panels on OSes other than ChromeOS.

chrome/browser/ui/panels/panel_mouse_watcher_timer.cc

-// 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.
-
-#include "base/macros.h"
-#include "base/time/time.h"
-#include "base/timer/timer.h"
-#include "chrome/browser/ui/panels/panel_mouse_watcher.h"
-#include "ui/display/screen.h"
-#include "ui/gfx/geometry/point.h"
-
-// A timer based implementation of PanelMouseWatcher.  Currently used for Gtk
-// and Mac panels implementations.
-class PanelMouseWatcherTimer : public PanelMouseWatcher {
- public:
-  PanelMouseWatcherTimer();
-  ~PanelMouseWatcherTimer() override;
-
- private:
-  void Start() override;
-  void Stop() override;
-  bool IsActive() const override;
-  gfx::Point GetMousePosition() const override;
-
-  // Specifies the rate at which we want to sample the mouse position.
-  static const int kMousePollingIntervalMs = 250;
-
-  // Timer callback function.
-  void DoWork();
-  friend class base::RepeatingTimer;
-
-  // Timer used to track mouse movements. Some OSes do not provide an easy way
-  // of tracking mouse movements across applications.  So we use a timer to
-  // accomplish the same.  This could also be more efficient as you end up
-  // getting a lot of notifications when tracking mouse movements.
-  base::RepeatingTimer timer_;
-
-  DISALLOW_COPY_AND_ASSIGN(PanelMouseWatcherTimer);
-};
-
-// static
-PanelMouseWatcher* PanelMouseWatcher::Create() {
-  return new PanelMouseWatcherTimer();
-}
-
-PanelMouseWatcherTimer::PanelMouseWatcherTimer() {
-}
-
-PanelMouseWatcherTimer::~PanelMouseWatcherTimer() {
-  DCHECK(!IsActive());
-}
-
-void PanelMouseWatcherTimer::Start() {
-  DCHECK(!IsActive());
-  timer_.Start(FROM_HERE,
-               base::TimeDelta::FromMilliseconds(kMousePollingIntervalMs),
-               this, &PanelMouseWatcherTimer::DoWork);
-}
-
-void PanelMouseWatcherTimer::Stop() {
-  DCHECK(IsActive());
-  timer_.Stop();
-}
-
-bool PanelMouseWatcherTimer::IsActive() const {
-  return timer_.IsRunning();
-}
-
-gfx::Point PanelMouseWatcherTimer::GetMousePosition() const {
-  return display::Screen::GetScreen()->GetCursorScreenPoint();
-}
-
-void PanelMouseWatcherTimer::DoWork() {
-  NotifyMouseMovement(GetMousePosition());
-}