Settings People Revamp: Add Manage Synced Data row to Sync Page.

chrome/app/settings_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Settings-specific strings (included from generated_resources.grd). -->
 <grit-part>
   <!-- About Page -->
   <if expr="chromeos">
     <message name="IDS_SETTINGS_ABOUT_PAGE_CHECK_FOR_UPDATES" desc="The button label to check for updates and apply (download and install) if found">
       Check for updates
     </message>
     <message name="IDS_SETTINGS_ABOUT_PAGE_CURRENT_CHANNEL_STABLE" desc="The stable label in the message about current channel.">
       stable
@@ skipping 1237 matching lines @@
   </message>
   <message name="IDS_SETTINGS_BOOKMARKS_CHECKBOX_LABEL" desc="Label for the checkbox which enables or disables syncing bookmarks between multiple browser instances.">
     Bookmarks
   </message>
   <message name="IDS_SETTINGS_PASSWORDS_CHECKBOX_LABEL" desc="Label for the checkbox which enables or disables syncing passwords between multiple browser instances.">
     Passwords
   </message>
   <message name="IDS_SETTINGS_OPEN_TABS_CHECKBOX_LABEL" desc="Label for the checkbox which enables or disables syncing open tabs between multiple browser instances.">
     Open Tabs
   </message>
+  <message name="IDS_SETTINGS_MANAGE_SYNCED_DATA_TITLE" desc="Title for the link to manage Chrome Sync data via Google Dashboard.">
+    Manage synced data
+  </message>
+  <message name="IDS_SETTINGS_MANAGE_SYNCED_DATA_DESCRIPTION" desc="Subtitle for the link to manage Chrome Sync data via Google Dashboard.">
+    Opens Google Dashboard
+  </message>
   <message name="IDS_SETTINGS_ENCRYPTION_OPTIONS" desc="Title for the section which includes options for encrypting sync settings.">
     Encryption options
   </message>
   <message name="IDS_SETTINGS_ENCRYPT_WITH_GOOGLE_CREDENTIALS_LABEL" desc="Label for the radio button which, when selected, causes synced settings to be encrypted with the Google login for the current browser profile.">
     Encrypt synced passwords with your Google credentials
   </message>
   <message name="IDS_SETTINGS_ENCRYPT_WITH_SYNC_PASSPHRASE_LABEL" desc="Label for the radio button which, when selected, causes synced settings to be encrypted with a user-provided password.">
     Encrypt all synced data with your own sync passphrase.
   </message>
   <message name="IDS_SETTINGS_ENCRYPT_WITH_SYNC_PASSPHRASE_LEARN_MORE_LINK" desc="Text for the link which explains how synced settings are encrypted with a user-provided password">
@@ skipping 278 matching lines @@
       System
     </message>
     <message name="IDS_SETTINGS_SYSTEM_HARDWARE_ACCELERATION_LABEL" desc="Label for the checkbox that forces Chrome to render via hardware acceleration (GPU) when available.">
       Use hardware acceleration when available
     </message>
     <message name="IDS_SETTINGS_SYSTEM_PROXY_SETTINGS_BUTTON" desc="Text for the button that changes a user's network proxy settings.">
       Change proxy settings
     </message>
   </if>
 </grit-part>