chromeos: Notify window manager about signout.

This makes us send a message to the window manager when the
user is logging out so the window manager can display a more
graceful transition (currently, you can sometimes see the
browser windows getting closed one by one).

The power manager already sends a similar message to the
window manager when we're shutting down.

BUG=chromium-os:9915
TEST=built and tried it with an updated window manager.  try bots pass too

Review URL: http://codereview.chromium.org/6047005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@70270 0039d316-1c4b-4281-b951-d872f2087c98

5 files changed, 13 insertions, 0 deletions

diff --git a/chrome/browser/browser_shutdown.cc b/chrome/browser/browser_shutdown.cc
index a312523..67f5b9d 100644
--- a/chrome/browser/browser_shutdown.cc
+++ b/chrome/browser/browser_shutdown.cc
@@ -48,6 +48,7 @@
 #include "chrome/browser/chromeos/boot_times_loader.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/cros/login_library.h"
+#include "chrome/browser/chromeos/wm_ipc.h"
 #endif
 
 using base::Time;
@@ -251,6 +252,7 @@ void Shutdown() {
   UnregisterURLRequestChromeJob();
 
 #if defined(OS_CHROMEOS)
+  chromeos::WmIpc::instance()->NotifyAboutSignout();
   if (chromeos::CrosLibrary::Get()->EnsureLoaded()) {
     chromeos::CrosLibrary::Get()->GetLoginLibrary()->StopSession("");
   }
diff --git a/chrome/browser/chromeos/login/screen_locker.cc b/chrome/browser/chromeos/login/screen_locker.cc
index 0a3ef83..d927935 100644
--- a/chrome/browser/chromeos/login/screen_locker.cc
+++ b/chrome/browser/chromeos/login/screen_locker.cc
@@ -872,6 +872,7 @@ void ScreenLocker::EnableInput() {
 void ScreenLocker::Signout() {
   if (!error_info_) {
     UserMetrics::RecordAction(UserMetricsAction("ScreenLocker_Signout"));
+    WmIpc::instance()->NotifyAboutSignout();
     if (CrosLibrary::Get()->EnsureLoaded()) {
       CrosLibrary::Get()->GetLoginLibrary()->StopSession("");
     }
diff --git a/chrome/browser/chromeos/wm_ipc.cc b/chrome/browser/chromeos/wm_ipc.cc
index aa09dd7..3e856f3 100644
--- a/chrome/browser/chromeos/wm_ipc.cc
+++ b/chrome/browser/chromeos/wm_ipc.cc
@@ -163,6 +163,11 @@ void WmIpc::SetLoggedInProperty(bool logged_in) {
                  values);
 }
 
+void WmIpc::NotifyAboutSignout() {
+  Message msg(chromeos::WM_IPC_MESSAGE_WM_NOTIFY_SIGNING_OUT);
+  SendMessage(msg);
+}
+
 WmIpc::WmIpc() {
   scoped_array<char*> names(new char*[kNumAtoms]);
   scoped_array<Atom> atoms(new Atom[kNumAtoms]);
diff --git a/chrome/browser/chromeos/wm_ipc.h b/chrome/browser/chromeos/wm_ipc.h
index a0c8abd..a8bfeb5 100644
--- a/chrome/browser/chromeos/wm_ipc.h
+++ b/chrome/browser/chromeos/wm_ipc.h
@@ -115,6 +115,9 @@ class WmIpc {
   // the user is currently logged in or not.
   void SetLoggedInProperty(bool logged_in);
 
+  // Sends a message to the window manager notifying it that we're signing out.
+  void NotifyAboutSignout();
+
  private:
   friend struct base::DefaultLazyInstanceTraits<WmIpc>;
 
diff --git a/chrome/browser/ui/browser_list.cc b/chrome/browser/ui/browser_list.cc
index dfdd576..ec5fef1 100644
--- a/chrome/browser/ui/browser_list.cc
+++ b/chrome/browser/ui/browser_list.cc
@@ -26,6 +26,7 @@
 #include "chrome/browser/chromeos/boot_times_loader.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/cros/login_library.h"
+#include "chrome/browser/chromeos/wm_ipc.h"
 #endif
 
 namespace {
@@ -189,6 +190,7 @@ void BrowserList::NotifyAndTerminate() {
                                          NotificationService::AllSources(),
                                          NotificationService::NoDetails());
 #if defined(OS_CHROMEOS)
+  chromeos::WmIpc::instance()->NotifyAboutSignout();
   if (chromeos::CrosLibrary::Get()->EnsureLoaded()) {
     chromeos::CrosLibrary::Get()->GetLoginLibrary()->StopSession("");
     return;