Add KeepaliveImpulse to extension process manager.

chrome/browser/apps/app_browsertest_util.cc

 // Copyright 2013 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/apps/app_browsertest_util.h"
 
 #include "apps/app_window_contents.h"
 #include "apps/shell_window_registry.h"
 #include "apps/ui/native_app_window.h"
 #include "base/command_line.h"
@@ skipping 18 matching lines @@
 
 PlatformAppBrowserTest::PlatformAppBrowserTest() {
   ChromeShellWindowDelegate::DisableExternalOpenForTesting();
 }
 
 void PlatformAppBrowserTest::SetUpCommandLine(CommandLine* command_line) {
   // Skips ExtensionApiTest::SetUpCommandLine.
   ExtensionBrowserTest::SetUpCommandLine(command_line);
 
   // Make event pages get suspended quicker.
-  command_line->AppendSwitchASCII(switches::kEventPageIdleTime, "1");
-  command_line->AppendSwitchASCII(switches::kEventPageSuspendingTime, "1");
+  command_line->AppendSwitchASCII(switches::kEventPageIdleTime, "1000");
+  command_line->AppendSwitchASCII(switches::kEventPageSuspendingTime, "1000");
 }
 
 // static
 ShellWindow* PlatformAppBrowserTest::GetFirstShellWindowForBrowser(
     Browser* browser) {
   ShellWindowRegistry* app_registry =
       ShellWindowRegistry::Get(browser->profile());
   const ShellWindowRegistry::ShellWindowList& shell_windows =
       app_registry->shell_windows();
 
@@ skipping 142 matching lines @@
                                           bounds);
 }
 
 void ExperimentalPlatformAppBrowserTest::SetUpCommandLine(
     CommandLine* command_line) {
   PlatformAppBrowserTest::SetUpCommandLine(command_line);
   command_line->AppendSwitch(switches::kEnableExperimentalExtensionApis);
 }
 
 }  // namespace extensions