Implement important sites dialog for desktop.

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 b25cfb12fcc46c495308cf1243e29b6e3b372769..4b51a50b6ef373825c9e68bd3861c6b1ff3d36c1 100644
--- a/chrome/app/settings_strings.grdp
+++ b/chrome/app/settings_strings.grdp
@@ -829,6 +829,15 @@
   <message name="IDS_SETTINGS_CLEAR_DATA_CLEARS_SYNCED_DATA" desc="Information that data which is synced across user's devices will be deleted from all those devices.">
     This clears synced data from all devices.
   </message>
+  <message name="IDS_SETTINGS_IMPORTANT_SITES_SUBTITLE" desc="Subtitle for the important sites dialog.">
+    This will clear cookies and cache for all sites, including:
+  </message>
+  <message name="IDS_SETTINGS_IMPORTANT_SITES_CONFIRM" desc="Text for confirmation button of the important sites dialog.">
+    Confirm
+  </message>
+  <message name="IDS_SETTINGS_NOTIFICATION_WARNING" desc="A warning that notifications will be disabled by deleting cookies for this site.">
+    Notifications will be disabled
+  </message>
 
   <!-- Printing -->
   <message name="IDS_SETTINGS_PRINTING" desc="Title of the printing page and navigation item to get there.">