Upstream the sign out and add an account dialogs.

chrome/android/java/strings/android_chrome_strings.grd

Index: chrome/android/java/strings/android_chrome_strings.grd
diff --git a/chrome/android/java/strings/android_chrome_strings.grd b/chrome/android/java/strings/android_chrome_strings.grd
index b144b7f87a81b432aee3b908d8dee062e3fef2c1..c037b42cfc53ca9a1e639e4443d805a80ddacc86 100644
--- a/chrome/android/java/strings/android_chrome_strings.grd
+++ b/chrome/android/java/strings/android_chrome_strings.grd
@@ -332,6 +332,26 @@ To obtain new licenses, connect to the internet and play your downloaded content
         Certificate Viewer
       </message>
 
+      <!-- Sign-in strings -->
+      <message name="IDS_ADD_ACCOUNT_TITLE" desc="Add account message for add google account dialog [CHAR-LIMIT=40]">

[newt (away), 2015/01/07 22:00:59]

"Title for add Google account dialog"

[aruslan, 2015/01/07 22:11:48]

Done.

+        Add a Google Account
+      </message>
+      <message name="IDS_ADD_ACCOUNT_MESSAGE" desc="Continue button for add google account dialog">

[newt (away), 2015/01/07 22:00:59]

fix description

[aruslan, 2015/01/07 22:11:49]

Done.

+        You have not yet set up a Google Account on this device
+      </message>
+      <message name="IDS_ADD_ACCOUNT_CONTINUE" desc="Continue button for add google account dialog [CHAR-LIMIT=20]">
+        Continue
+      </message>
+      <message name="IDS_SIGNOUT_TITLE" desc="Title for sign out google account dialog">

[newt (away), 2015/01/07 22:00:59]

fix description

[aruslan, 2015/01/07 22:11:49]

Done.

+        Sign out of Chrome
+      </message>
+      <message name="IDS_SIGNOUT_MESSAGE" desc="Message to display for sign out google account dialog">

[newt (away), 2015/01/07 22:00:59]

"... sign out of Chrome dialog"

[aruslan, 2015/01/07 22:11:49]

Done.

+        The data stored on this device as well as the data stored in your Google Account will remain in both places. However, new data or changes you make to your data will not be synchronized between them.
+      </message>
+      <message name="IDS_SIGNOUT_MANAGED_ACCOUNT_MESSAGE" desc="Message to display for sign out google account dialog when the account has enterprise management, and all user data will be erased">

[newt (away), 2015/01/07 22:00:59]

"... sign out of Chrome ..."

[aruslan, 2015/01/07 22:11:49]

Done.

+        You are signing out of an account managed by <ph name="DOMAIN_NAME">%1$s<ex>google.com</ex></ph>. This will delete the Chrome data stored on this device, but the data will remain in your Google Account.
+      </message>
+
       <!-- Sync error strings -->
       <message desc="Sync error string for generic error. [CHAR-LIMIT=80]" name="IDS_SYNC_ERROR_GENERIC">
         Sync error