Settings Rewrite: Add Sign-in (Chrome) section

chrome/app/settings_strings.grdp

Index: chrome/app/settings_strings.grdp
diff --git a/chrome/app/settings_strings.grdp b/chrome/app/settings_strings.grdp
index 864b60951369d3e78aa1d30f2f05c82e0a083f11..cf52bd16c3b86e3f8d3ff91965d02317abae90b7 100644
--- a/chrome/app/settings_strings.grdp
+++ b/chrome/app/settings_strings.grdp
@@ -3,7 +3,7 @@
 <grit-part>
   <!-- Policy Indicators -->
   <message name="IDS_SETTINGS_CONTROLLED_SETTING_EXTENSION" desc="Text displayed in the controlled settings indicator tooltip when a setting's value is enforced by an extension.">
-    This setting is controlled by extension <ph name="NAME">$1<ex>Settings Extension</ex></ph> 
+    This setting is controlled by extension <ph name="NAME">$1<ex>Settings Extension</ex></ph>
   </message>
 
   <if expr="chromeos">
@@ -448,6 +448,11 @@
     Site URL
   </message>
 
+  <!-- Sign-in Page -->
+  <message name="IDS_SETTINGS_SIGNIN" desc="Name of the settings page which manages Chrome's signed-in Google profile.">
+    Sign in
+  </message>
+
   <!-- Sync Page -->
   <message name="IDS_SETTINGS_SYNC" desc="Name of the settings page which manages syncing data between multiple browser instances with the same Google profile.">
     Advanced sync settings