End session event on browser window

atom/browser/api/atom_api_window.cc

@@ -191,6 +191,12 @@ void Window::OnWindowClosed() {
       FROM_HERE, GetDestroyClosure());
 }
 
+#if defined(OS_WIN)
+void Window::OnWindowEndSession() {
+  Emit("endsession");
+}
+#endif
+
 void Window::OnWindowBlur() {
   Emit("blur");
 }

atom/browser/api/atom_api_window.h

@@ -92,6 +92,7 @@ class Window : public mate::TrackableObject<Window>,
                             const base::DictionaryValue& details) override;
 
   #if defined(OS_WIN)
+  void Window::OnWindowEndSession() override;
   void OnWindowMessage(UINT message, WPARAM w_param, LPARAM l_param) override;
   #endif
 

atom/browser/atom_browser_main_parts.cc

@@ -25,6 +25,10 @@
 #include "device/geolocation/geolocation_provider.h"
 #include "v8/include/v8-debug.h"
 
+#if defined(USE_AURA)
+#include "ui/wm/core/wm_state.h"
+#endif
+
 #if defined(USE_X11)
 #include "chrome/browser/ui/libgtkui/gtk_util.h"
 #include "ui/events/devices/x11/touch_factory_x11.h"
@@ -57,6 +61,10 @@ void Erase(T* container, typename T::iterator iter) {
 // static
 AtomBrowserMainParts* AtomBrowserMainParts::self_ = nullptr;
 
+#if defined(USE_AURA)
+wm::WMState* wm_state_ = nullptr;
+#endif
+
 AtomBrowserMainParts::AtomBrowserMainParts()
     : fake_browser_process_(new BrowserProcess),
       exit_code_(nullptr),
@@ -159,6 +167,10 @@ void AtomBrowserMainParts::PreMainMessageLoopRun() {
   node_bindings_->PrepareMessageLoop();
   node_bindings_->RunMessageLoop();
 
+#if defined(USE_AURA)
+  wm_state_ = new wm::WMState;
+#endif
+
 #if defined(USE_X11)
   ui::TouchFactory::SetTouchDeviceListFromCommandLine();
 #endif

atom/browser/native_window.cc

@@ -474,6 +474,13 @@ void NativeWindow::NotifyWindowClosed() {
     observer.OnWindowClosed();
 }
 
+#if defined(OS_WIN)
+void NativeWindow::NotifyWindowEndSession() {
+  for (NativeWindowObserver& observer : observers_)
+    observer.OnWindowEndSession();
+}
+#endif
+
 void NativeWindow::NotifyWindowBlur() {
   for (NativeWindowObserver& observer : observers_)
     observer.OnWindowBlur();

atom/browser/native_window.h

@@ -244,6 +244,7 @@ class NativeWindow : public base::SupportsUserData,
                                      const base::DictionaryValue& details);
 
   #if defined(OS_WIN)
+  void NotifyWindowEndSession();
   void NotifyWindowMessage(UINT message, WPARAM w_param, LPARAM l_param);
   #endif
 

atom/browser/native_window_observer.h

@@ -78,6 +78,7 @@ class NativeWindowObserver {
 
   // Called when window message received
   #if defined(OS_WIN)
+  virtual void OnWindowEndSession() {}
   virtual void OnWindowMessage(UINT message, WPARAM w_param, LPARAM l_param) {}
   #endif
 

atom/browser/native_window_views_win.cc

@@ -147,6 +147,11 @@ bool NativeWindowViews::PreHandleMSG(
       }
       return false;
     }
+    case WM_ENDSESSION: {
+      if (w_param) {
+        NotifyWindowEndSession();
+      }
+    }
     default:
       return false;
   }

docs/api/browser-window.md

@@ -376,6 +376,11 @@ window.onbeforeunload = (e) => {
 Emitted when the window is closed. After you have received this event you should
 remove the reference to the window and avoid using it any more.
 
+#### Event: 'endsession' _Windows_
+
+Emitted when window session is going to end due to force shutdown or machine restart 
+or session log off.
+
 #### Event: 'unresponsive'
 
 Emitted when the web page becomes unresponsive.