CrOS: Add print statements to help debug BrowserProcessImpl::Unpin crash.

chrome/browser/notifications/profile_notification.cc

 // Copyright 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 "chrome/browser/notifications/profile_notification.h"
 
 #include "base/strings/stringprintf.h"
 #include "build/build_config.h"
+#include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/lifetime/keep_alive_types.h"
 #include "chrome/browser/lifetime/scoped_keep_alive.h"
 #include "chrome/browser/ui/ash/multi_user/multi_user_util.h"
 #include "components/signin/core/account_id/account_id.h"
+#include "content/public/browser/notification_service.h"
 
 // static
 std::string ProfileNotification::GetProfileNotificationId(
     const std::string& delegate_id,
     ProfileID profile_id) {
   DCHECK(profile_id);
   return base::StringPrintf("notification-ui-manager#%p#%s",
                             profile_id,  // Each profile has its unique instance
                                          // including incognito profile.
                             delegate_id.c_str());
 }
 
 ProfileNotification::ProfileNotification(Profile* profile,
                                          const Notification& notification)
     : profile_id_(NotificationUIManager::GetProfileID(profile)),
       notification_(
           // Uses Notification's copy constructor to assign the message center
           // id, which should be unique for every profile + Notification pair.
           GetProfileNotificationId(
               notification.delegate_id(),
               NotificationUIManager::GetProfileID(profile)),
           notification),
       keep_alive_(new ScopedKeepAlive(KeepAliveOrigin::NOTIFICATION,
                                       KeepAliveRestartOption::DISABLED)) {
   DCHECK(profile);
 #if defined(OS_CHROMEOS)
   notification_.set_profile_id(
       multi_user_util::GetAccountIdFromProfile(profile).GetUserEmail());
 #endif
+
+  registrar_.Add(this, chrome::NOTIFICATION_APP_TERMINATING,
+                 content::NotificationService::AllSources());
+  registrar_.Add(this, chrome::NOTIFICATION_CLOSE_ALL_BROWSERS_REQUEST,
+                 content::NotificationService::AllSources());
 }
 
 ProfileNotification::~ProfileNotification() {}
+
+void ProfileNotification::Observe(int type,
+                                  const content::NotificationSource& source,
+                                  const content::NotificationDetails& details) {
+  switch (type) {
+    case chrome::NOTIFICATION_APP_TERMINATING: {
+      VLOG(1) << "ProfileNotification Terminating";

[sky, 2017/03/22 03:56:16]

If you really need to log this information, add it to the call sites, not here.

+      break;
+    }
+    case chrome::NOTIFICATION_CLOSE_ALL_BROWSERS_REQUEST: {
+      VLOG(1) << "ProfileNotification Close All Browsers Request";
+      break;
+    }
+  }
+}