Integrate audible tab tracking into desktop engagement service.

chrome/browser/ui/cocoa/browser_window_controller.mm

Index: chrome/browser/ui/cocoa/browser_window_controller.mm
diff --git a/chrome/browser/ui/cocoa/browser_window_controller.mm b/chrome/browser/ui/cocoa/browser_window_controller.mm
index 0f9b7296a03c4420f1671ce6bcc379ce44020d32..8336f9f910491422db15eb382fd64c21b249012f 100644
--- a/chrome/browser/ui/cocoa/browser_window_controller.mm
+++ b/chrome/browser/ui/cocoa/browser_window_controller.mm
@@ -598,9 +598,9 @@ bool IsTabDetachingInFullscreenEnabled() {
 
 // Called right after our window became the main window.
 - (void)windowDidBecomeMain:(NSNotification*)notification {
-  if (chrome::GetLastActiveBrowser() != browser_.get()) {
-    BrowserList::SetLastActive(browser_.get());
-  }
+  //  if (chrome::GetLastActiveBrowser() != browser_.get()) {
+  BrowserList::SetLastActive(browser_.get());
+  //}
   // Always saveWindowPositionIfNeeded when becoming main, not just
   // when |browser_| is not the last active browser. See crbug.com/536280 .
   [self saveWindowPositionIfNeeded];
@@ -624,6 +624,8 @@ bool IsTabDetachingInFullscreenEnabled() {
 
   extensions::ExtensionCommandsGlobalRegistry::Get(browser_->profile())
       ->set_registry_for_active_window(nullptr);
+
+  BrowserList::NotifyBrowserNoLongerActive(browser_.get());
 }
 
 // Called when we have been minimized.