Don't try to load an event page to fire an event if the browser is shutting down.

BUG=276610

Review URL: https://chromiumcodereview.appspot.com/23537019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@221311 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/extensions/lazy_background_task_queue.cc

@@ -5,6 +5,7 @@
 #include "chrome/browser/extensions/lazy_background_task_queue.h"
 
 #include "base/callback.h"
+#include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_process_manager.h"
@@ -58,6 +59,10 @@ void LazyBackgroundTaskQueue::AddPendingTask(
     Profile* profile,
     const std::string& extension_id,
     const PendingTask& task) {
+  if (g_browser_process->IsShuttingDown()) {
+    task.Run(NULL);
+    return;
+  }
   PendingTasksList* tasks_list = NULL;
   PendingTasksKey key(profile, extension_id);
   PendingTasksMap::iterator it = pending_tasks_.find(key);

chrome/browser/extensions/lazy_background_task_queue.h

@@ -42,8 +42,8 @@ class LazyBackgroundTaskQueue : public content::NotificationObserver {
   // Adds a task to the queue for a given extension. If this is the first
   // task added for the extension, its lazy background page will be loaded.
   // The task will be called either when the page is loaded, or when the
-  // page fails to load for some reason (e.g. a crash). In the latter case,
-  // the ExtensionHost parameter is NULL.
+  // page fails to load for some reason (e.g. a crash or browser
+  // shutdown). In the latter case, the ExtensionHost parameter is NULL.
   void AddPendingTask(
       Profile* profile,
       const std::string& extension_id,