Chrome OS should open to empty desktop when session restore is empty.

chrome/browser/policy/policy_browsertest.cc

Index: chrome/browser/policy/policy_browsertest.cc
diff --git a/chrome/browser/policy/policy_browsertest.cc b/chrome/browser/policy/policy_browsertest.cc
index 0bddfa1495b58e5c7784a0bd193771647d396a0e..12f19141f3d5bad8c266490c6441912fffd5495c 100644
--- a/chrome/browser/policy/policy_browsertest.cc
+++ b/chrome/browser/policy/policy_browsertest.cc
@@ -53,6 +53,7 @@
 #include "chrome/browser/ui/tab_contents/tab_contents.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/chrome_notification_types.h"
+#include "chrome/common/chrome_switches.h"
 #include "chrome/common/content_settings.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_constants.h"
@@ -1208,6 +1209,14 @@ class RestoreOnStartupPolicyTest
   RestoreOnStartupPolicyTest() {}
   virtual ~RestoreOnStartupPolicyTest() {}
 
+#if defined(OS_CHROMEOS)
+  virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
+    // TODO(nkostylev): Investigate if we can remove this switch.
+    command_line->AppendSwitch(switches::kCreateBrowserOnStartupForTests);
+    PolicyTest::SetUpCommandLine(command_line);
+  }
+#endif
+
   virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
     PolicyTest::SetUpInProcessBrowserTestFixture();
     // Set early policies now, before the browser is created.