ChromeOS: Do not show the error dialog when captive portal is detected in OOBE.

chrome/browser/chromeos/login/ui/captive_portal_window_proxy.cc

Index: chrome/browser/chromeos/login/ui/captive_portal_window_proxy.cc
diff --git a/chrome/browser/chromeos/login/ui/captive_portal_window_proxy.cc b/chrome/browser/chromeos/login/ui/captive_portal_window_proxy.cc
index 24b00ecc3556eea6676f91f3af28a84fcc242824..c0762b0fab22a9a9caf7591d18c51be40d4709d9 100644
--- a/chrome/browser/chromeos/login/ui/captive_portal_window_proxy.cc
+++ b/chrome/browser/chromeos/login/ui/captive_portal_window_proxy.cc
@@ -4,6 +4,7 @@
 
 #include "chrome/browser/chromeos/login/ui/captive_portal_window_proxy.h"
 
+#include "base/metrics/histogram_macros.h"
 #include "chrome/browser/chromeos/login/ui/captive_portal_view.h"
 #include "chrome/browser/chromeos/login/ui/proxy_settings_dialog.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
@@ -90,8 +91,14 @@ void CaptivePortalWindowProxy::Close() {
 }
 
 void CaptivePortalWindowProxy::OnRedirected() {
-  if (GetState() == STATE_WAITING_FOR_REDIRECTION)
+  if (GetState() == STATE_WAITING_FOR_REDIRECTION) {
+    if (!started_loading_at_.is_null()) {
+      UMA_HISTOGRAM_TIMES("CaptivePortal.RedirectTime",
+                          base::Time::Now() - started_loading_at_);
+      started_loading_at_ = base::Time();
+    }
     Show();
+  }
   delegate_->OnPortalDetected();
 }
 
@@ -124,6 +131,8 @@ void CaptivePortalWindowProxy::InitCaptivePortalView() {
         new CaptivePortalView(ProfileHelper::GetSigninProfile(), this));
     captive_portal_view_for_testing_ = captive_portal_view_.get();
   }
+
+  started_loading_at_ = base::Time::Now();
   captive_portal_view_->StartLoad();
 }