Make the policy fetch for first time login blocking

chrome/test/base/in_process_browser_test.cc

Index: chrome/test/base/in_process_browser_test.cc
diff --git a/chrome/test/base/in_process_browser_test.cc b/chrome/test/base/in_process_browser_test.cc
index 8d46230856806813eb86176a7dfcad94e1b6f89d..c6811cec5aa6b6554c334a816630b16f8297088f 100644
--- a/chrome/test/base/in_process_browser_test.cc
+++ b/chrome/test/base/in_process_browser_test.cc
@@ -112,6 +112,7 @@ void SingleDesktopTestObserver::OnBrowserAdded(Browser* browser) {
 InProcessBrowserTest::InProcessBrowserTest()
     : browser_(NULL),
       exit_when_last_browser_closes_(true),
+      open_about_blank_on_browser_launch_(true),
       multi_desktop_test_(false)
 #if defined(OS_MACOSX)
       , autorelease_pool_(NULL)
@@ -248,7 +249,7 @@ void InProcessBrowserTest::PrepareTestCommandLine(CommandLine* command_line) {
   if (exit_when_last_browser_closes_)
     command_line->AppendSwitch(switches::kDisableZeroBrowsersOpenForTests);
 
-  if (command_line->GetArgs().empty())
+  if (open_about_blank_on_browser_launch_ && command_line->GetArgs().empty())
     command_line->AppendArg(url::kAboutBlankURL);
 }