Restart running apps when chrome restarts.

chrome/browser/extensions/platform_app_browsertest_util.cc

Index: chrome/browser/extensions/platform_app_browsertest_util.cc
diff --git a/chrome/browser/extensions/platform_app_browsertest_util.cc b/chrome/browser/extensions/platform_app_browsertest_util.cc
index 2795469610a83fd9694b1618ccb95b8ad02a4001..7b2af252fd9ca0fa54c8bdcde28bc4bea9712cae 100644
--- a/chrome/browser/extensions/platform_app_browsertest_util.cc
+++ b/chrome/browser/extensions/platform_app_browsertest_util.cc
@@ -63,6 +63,10 @@ PlatformAppBrowserTest::~PlatformAppBrowserTest() {
 void PlatformAppBrowserTest::SetUpCommandLine(CommandLine* command_line) {
   ExtensionBrowserTest::SetUpCommandLine(command_line);
   command_line->AppendSwitch(switches::kEnableExperimentalExtensionApis);
+
+  // Make event pages get suspended quicker.
+  command_line->AppendSwitchASCII(switches::kEventPageIdleTime, "1");
+  command_line->AppendSwitchASCII(switches::kEventPageUnloadingTime, "1");
 }
 
 void PlatformAppBrowserTest::SetUpOnMainThread() {