Listen to WM_TIMECHANGE messages in RenderViewHostImpl on windows

content/browser/time_zone_monitor_win.cc

Index: content/browser/time_zone_monitor_win.cc
diff --git a/content/browser/time_zone_monitor_win.cc b/content/browser/time_zone_monitor_win.cc
new file mode 100644
index 0000000000000000000000000000000000000000..873650b794bd87313ae9b1f8c3aacdd88dec65cb
--- /dev/null
+++ b/content/browser/time_zone_monitor_win.cc
@@ -0,0 +1,32 @@
+// Copyright (c) 2014 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 "content/browser/time_zone_monitor_win.h"
+
+#include "content/public/browser/render_process_host.h"
+
+namespace content {
+
+TimeZoneMonitorWin::TimeZoneMonitorWin() {
+  gfx::SingletonHwnd::GetInstance()->AddObserver(this);
+}
+
+TimeZoneMonitorWin::~TimeZoneMonitorWin() {
+  gfx::SingletonHwnd::GetInstance()->RemoveObserver(this);
+}
+
+void TimeZoneMonitorWin::OnWndProc(HWND hwnd,
+                                   UINT message,
+                                   WPARAM wparam,
+                                   LPARAM lparam) {
+  if (message != WM_TIMECHANGE)
+    return;
+
+  for (RenderProcessHost::iterator it = RenderProcessHost::AllHostsIterator();
+       !it.IsAtEnd(); it.Advance()) {
+      it.GetCurrentValue()->NotifyTimezoneChange();
+  }
+}
+
+}