Reorder browser list on workspace switch

ui/display/desktop_observer.cc

Index: ui/display/desktop_observer.cc
diff --git a/ui/display/desktop_observer.cc b/ui/display/desktop_observer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0a15c1a951d98aa3a5c85ee058ac474ccaefb5d8
--- /dev/null
+++ b/ui/display/desktop_observer.cc
@@ -0,0 +1,34 @@
+// Copyright 2016 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/display/desktop_observer.h"
+
+namespace display {
+
+namespace desktop {
+
+namespace {
+
+base::ObserverList<DesktopObserver> g_desktop_observer_list;

[Lei Zhang, 2016/06/29 20:51:01]

This probably should be a LazyInstance or it will add a static initializer.

[Tom (Use chromium acct), 2016/06/29 21:12:50]

Done.

+
+}  // anonymous namespace
+
+DesktopObserver::~DesktopObserver() {}
+
+void AddObserver(DesktopObserver* observer) {
+  g_desktop_observer_list.AddObserver(observer);
+}
+
+void RemoveObserver(DesktopObserver* observer) {
+  g_desktop_observer_list.RemoveObserver(observer);
+}
+
+void OnWorkspaceChanged(const std::string& new_workspace) {
+  FOR_EACH_OBSERVER(DesktopObserver, g_desktop_observer_list,
+                    OnWorkspaceChanged(new_workspace));
+}
+
+}  // namespace desktop
+
+}  // namespace display