Add a modal confirmation dialog to the enterprise profile sign-in flow.

chrome/common/url_constants.cc

Index: chrome/common/url_constants.cc
diff --git a/chrome/common/url_constants.cc b/chrome/common/url_constants.cc
index ecf780175aba83c401a467fb7db10b1234bd1ba2..b42ea7a1ec04f1ed3759450fc5ecc860b1adb9c0 100644
--- a/chrome/common/url_constants.cc
+++ b/chrome/common/url_constants.cc
@@ -58,6 +58,8 @@ const char kChromeUIOmniboxURL[] = "chrome://omnibox/";
 const char kChromeUIPerformanceMonitorURL[] = "chrome://performance/";
 const char kChromeUIPluginsURL[] = "chrome://plugins/";
 const char kChromeUIPolicyURL[] = "chrome://policy/";
+const char kChromeUIProfileSigninConfirmationURL[] =
+    "chrome://profile-signin-confirmation/";
 const char kChromeUIPrintURL[] = "chrome://print/";
 const char kChromeUISessionFaviconURL[] = "chrome://session-favicon/";
 const char kChromeUISettingsURL[] = "chrome://settings/";
@@ -175,6 +177,8 @@ const char kChromeUIOmniboxHost[] = "omnibox";
 const char kChromeUIPerformanceMonitorHost[] = "performance";
 const char kChromeUIPluginsHost[] = "plugins";
 const char kChromeUIPolicyHost[] = "policy";
+const char kChromeUIProfileSigninConfirmationHost[] =
+    "profile-signin-confirmation";
 const char kChromeUIPredictorsHost[] = "predictors";
 const char kChromeUIPrintHost[] = "print";
 const char kChromeUIProfilerHost[] = "profiler";