Initial implementation of status tray functionality (mac-only, currently).

chrome/browser/status_icons/status_tray.cc

+// Copyright (c) 2010 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 "chrome/browser/status_icons/status_tray.h"
+
+#include "base/stl_util-inl.h"
+#include "chrome/browser/status_icons/status_icon.h"
+
+StatusTray::StatusTray(StatusIconFactory* factory)
+    : factory_(factory) {
+}
+
+StatusTray::~StatusTray() {
+  // Walk any active status icons and delete them.
+  STLDeleteContainerPairSecondPointers(status_icons_.begin(),
+                                       status_icons_.end());
+}
+
+StatusIcon* StatusTray::GetStatusIcon(const string16& identifier) {
+  StatusIconMap::const_iterator iter = status_icons_.find(identifier);
+  if (iter != status_icons_.end())
+    return iter->second;
+
+  // No existing StatusIcon, create a new one.
+  StatusIcon* icon = factory_->CreateIcon();
+  if (icon)
+    status_icons_[identifier] = icon;
+  return icon;
+}
+
+void StatusTray::RemoveStatusIcon(const string16& identifier) {
+  StatusIconMap::iterator iter = status_icons_.find(identifier);
+  if (iter != status_icons_.end()) {
+    // Free the StatusIcon from the map (can't put scoped_ptr in a map, so we
+    // have to do it manually).
+    delete iter->second;
+    status_icons_.erase(iter);
+  }
+}