Move tray code from ui/chromeos/network/

ui/chromeos/network/network_icon_animation.cc

-// 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.
-
-#include "ui/chromeos/network/network_icon_animation.h"
-
-#include "ui/chromeos/network/network_icon_animation_observer.h"
-
-namespace {
-const int kThrobDurationMs = 750;  // Animation cycle length.
-}
-
-namespace ui {
-namespace network_icon {
-
-NetworkIconAnimation::NetworkIconAnimation()
-    : animation_(this) {
-  // Set up the animation throbber.
-  animation_.SetThrobDuration(kThrobDurationMs);
-  animation_.SetTweenType(gfx::Tween::LINEAR);
-}
-
-NetworkIconAnimation::~NetworkIconAnimation() {
-}
-
-void NetworkIconAnimation::AnimationProgressed(
-    const gfx::Animation* animation) {
-  if (animation != &animation_)
-    return;
-  for (AnimationObserver& observer : observers_)
-    observer.NetworkIconChanged();
-}
-
-double NetworkIconAnimation::GetAnimation() {
-  if (!animation_.is_animating()) {
-    animation_.Reset();
-    animation_.StartThrobbing(-1 /*throb indefinitely*/);
-    return 0;
-  }
-  return animation_.GetCurrentValue();
-}
-
-void NetworkIconAnimation::AddObserver(AnimationObserver* observer) {
-  if (!observers_.HasObserver(observer))
-    observers_.AddObserver(observer);
-}
-
-void NetworkIconAnimation::RemoveObserver(AnimationObserver* observer) {
-  observers_.RemoveObserver(observer);
-  if (!observers_.might_have_observers())
-    animation_.Reset();  // Stops the animation and resets the current value.
-}
-
-// static
-NetworkIconAnimation* NetworkIconAnimation::GetInstance() {
-  static NetworkIconAnimation* s_icon_animation =
-      new NetworkIconAnimation();
-  return s_icon_animation;
-}
-
-}  // namespace network_icon
-}  // namespace ui