Block framebusts without a user gesture

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index aae209d121deacac3c7f46800b9a6dce2e42b28c..e4ef171cdaa6ec9e4c6d1700aeed3fe98e1eee6c 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -15211,6 +15211,12 @@ Please check your email at <ph name="ACCOUNT_EMAIL">$2<ex>jane.doe@gmail.com</ex
     <message name="IDS_FLAGS_FONT_CACHE_SCALING_DESCRIPTION" desc="Description for the flag to enable FontCache scaling">
       Reuse a cached font in the renderer to serve different sizes of font for faster layout.
     </message>
+    <message name="IDS_FLAGS_FRAMEBUSTING_NAME" desc="Title for the flag to enable Framebusting restrictions">
+      Framebusting requires same-origin or a user gesture
+    </message>
+    <message name="IDS_FLAGS_FRAMEBUSTING_DESCRIPTION" desc="Description for the flag that prevents an iframe (typically an ad) from navigating the top level browsing context (the whole tab) unless the top and the iframe are part of the same website or the the navigation is requested in response to a user action (e.g., the user clicked on the tab)">
+      Don't permit an iframe to navigate the top level browsing context unless they are same-origin or the iframe is processing a user gesture.
+    </message>
     <if expr="is_macosx">
       <message name="IDS_ANNOUNCEMENT_COMPLETION_AVAILABLE_MAC" desc="Text to be
 read aloud to screenreader users to announce that a completion is available.">