Keep browser process alive while there are platform apps with background pages running.

chrome/browser/extensions/api/push_messaging/push_messaging_apitest.cc

 // Copyright (c) 2012 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/extensions/api/push_messaging/push_messaging_api.h"
 #include "chrome/browser/extensions/api/push_messaging/push_messaging_invalidation_handler.h"
 #include "chrome/browser/extensions/api/push_messaging/push_messaging_invalidation_mapper.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
@@ skipping 34 matching lines @@
 
   PushMessagingEventRouter* GetEventRouter() {
     return ExtensionSystem::Get(browser()->profile())->extension_service()->
         push_messaging_event_router();
   }
 };
 
 IN_PROC_BROWSER_TEST_F(PushMessagingApiTest, EventDispatch) {
   ResultCatcher catcher;
   catcher.RestrictToProfile(browser()->profile());
-  ExtensionTestMessageListener ready("ready", true);
+  ExtensionTestMessageListener ready("ready", false);
 
   const extensions::Extension* extension =
       LoadExtension(test_data_dir_.AppendASCII("push_messaging"));
   ASSERT_TRUE(extension);
   ui_test_utils::NavigateToURL(
       browser(), extension->GetResourceURL("event_dispatch.html"));
   EXPECT_TRUE(ready.WaitUntilSatisfied());
 
   GetEventRouter()->TriggerMessageForTest(extension->id(), 1, "payload");
 
   EXPECT_TRUE(catcher.GetNextResult()) << catcher.message();
 }
 
 // Test that a push introduced into the sync code makes it to the extension
 // that we install.
 IN_PROC_BROWSER_TEST_F(PushMessagingApiTest, ReceivesPush) {
   ResultCatcher catcher;
   catcher.RestrictToProfile(browser()->profile());
-  ExtensionTestMessageListener ready("ready", true);
+  ExtensionTestMessageListener ready("ready", false);
 
   const extensions::Extension* extension =
       LoadExtension(test_data_dir_.AppendASCII("push_messaging"));
   ASSERT_TRUE(extension);
   ui_test_utils::NavigateToURL(
       browser(), extension->GetResourceURL("event_dispatch.html"));
   EXPECT_TRUE(ready.WaitUntilSatisfied());
 
   ProfileSyncService* pss = ProfileSyncServiceFactory::GetForProfile(
       browser()->profile());
@@ skipping 58 matching lines @@
   const extensions::Extension* extension =
       LoadExtension(test_data_dir_.AppendASCII("push_messaging"));
   ASSERT_TRUE(extension);
   ui_test_utils::NavigateToURL(
       browser(), extension->GetResourceURL("get_channel_id.html"));
 
   EXPECT_TRUE(catcher.GetNextResult()) << catcher.message();
 }
 
 }  // namespace extensions