Adding <keygen> Content Setting (UI)

chrome/app/theme/theme_resources.grd

 <?xml version="1.0" encoding="utf-8"?>
 <!-- This grd file contains images that are pre-scaled for device scale
      factors. The image returned by |base::ResourceBundle::GetImageNamed|
      will contain multiple |gfx:ImageSkiaReps| for each scale factors. The
      |fallback_to_low_resolution| attribute controls behavior when
      an image file is missing for target scale factor. If true, chrome
      will automatically scale the 1x image to the target scale factor.
      If false, build will fail due to missing resources. This is
      currently set to true for all resources, but the default will
      become false in near future.
@@ skipping 15 matching lines @@
     <structures fallback_to_low_resolution="true">
       <!-- KEEP THESE IN ALPHABETICAL ORDER!  DO NOT ADD TO RANDOM PLACES JUST
            BECAUSE YOUR RESOURCES ARE FUNCTIONALLY RELATED OR FALL UNDER THE
            SAME CONDITIONALS. -->
       <structure type="chrome_scaled_image" name="IDR_ACCESSED_COOKIES" file="common/accessed_cookies.png" />
       <structure type="chrome_scaled_image" name="IDR_ALLOWED_CAMERA" file="common/allowed_camera.png" />
       <structure type="chrome_scaled_image" name="IDR_ALLOWED_DOWNLOADS" file="common/allowed_downloads.png" />
       <structure type="chrome_scaled_image" name="IDR_ALLOWED_FULLSCREEN" file="common/allowed_fullscreen.png" />
       <structure type="chrome_scaled_image" name="IDR_ALLOWED_IMAGES" file="common/allowed_images.png" />
       <structure type="chrome_scaled_image" name="IDR_ALLOWED_JAVASCRIPT" file="common/allowed_script.png" />
+      <structure type="chrome_scaled_image" name="IDR_ALLOWED_KEYGEN" file="common/allowed_script.png" />
       <structure type="chrome_scaled_image" name="IDR_ALLOWED_LOCATION" file="common/allowed_location.png" />
       <structure type="chrome_scaled_image" name="IDR_ALLOWED_MIC" file="common/allowed_mic.png" />
       <structure type="chrome_scaled_image" name="IDR_ALLOWED_MIDI_SYSEX" file="common/allowed_midi.png" />
       <structure type="chrome_scaled_image" name="IDR_ALLOWED_MOUSE_CURSOR" file="common/allowed_mouse_cursor.png" />
       <structure type="chrome_scaled_image" name="IDR_ALLOWED_NOTIFICATION" file="common/allowed_notifications.png" />
       <if expr="enable_plugins">
         <structure type="chrome_scaled_image" name="IDR_ALLOWED_PLUGINS" file="common/allowed_plugins.png" />
       </if>
       <structure type="chrome_scaled_image" name="IDR_ALLOWED_POPUPS" file="common/allowed_popups.png" />
       <if expr="enable_app_list and is_win and not _google_chrome">
@@ skipping 47 matching lines @@
         <structure type="chrome_scaled_image" name="IDR_BACK" file="common/browser_back_normal.png" />
         <structure type="chrome_scaled_image" name="IDR_BACK_D" file="common/browser_back_disabled.png" />
         <structure type="chrome_scaled_image" name="IDR_BACK_H" file="common/browser_back_hover.png" />
         <structure type="chrome_scaled_image" name="IDR_BACK_P" file="common/browser_back_pressed.png" />
       </if>
       <structure type="chrome_scaled_image" name="IDR_BLOCKED_CAMERA" file="common/blocked_camera.png" />
       <structure type="chrome_scaled_image" name="IDR_BLOCKED_COOKIES" file="common/blocked_cookies.png" />
       <structure type="chrome_scaled_image" name="IDR_BLOCKED_DOWNLOADS" file="common/blocked_downloads.png" />
       <structure type="chrome_scaled_image" name="IDR_BLOCKED_IMAGES" file="common/blocked_images.png" />
       <structure type="chrome_scaled_image" name="IDR_BLOCKED_JAVASCRIPT" file="common/blocked_script.png" />
+      <structure type="chrome_scaled_image" name="IDR_BLOCKED_KEYGEN" file="common/blocked_script.png" />

[oshima, 2016/01/05 22:38:48]

what's the reason to add new IDR for the same image? Are you going to add new
png later?

       <structure type="chrome_scaled_image" name="IDR_BLOCKED_LOCATION" file="common/blocked_location.png" />
       <structure type="chrome_scaled_image" name="IDR_BLOCKED_MIC" file="common/blocked_mic.png" />
       <structure type="chrome_scaled_image" name="IDR_BLOCKED_MIDI_SYSEX" file="common/blocked_midi.png" />
       <structure type="chrome_scaled_image" name="IDR_BLOCKED_MIXED_CONTENT" file="common/blocked_mixed_content.png" />
       <structure type="chrome_scaled_image" name="IDR_BLOCKED_MOUSE_CURSOR" file="common/blocked_mouse_cursor.png" />
       <structure type="chrome_scaled_image" name="IDR_BLOCKED_NOTIFICATION" file="common/blocked_notifications.png" />
       <if expr="enable_plugins">
         <structure type="chrome_scaled_image" name="IDR_BLOCKED_PLUGINS" file="common/blocked_plugins.png" />
       </if>
       <structure type="chrome_scaled_image" name="IDR_BLOCKED_POPUPS" file="common/blocked_popups.png" />
@@ skipping 869 matching lines @@
         <structure type="chrome_scaled_image" name="IDR_PEOPLE_SEARCH_ACTION_EMAIL" file="common/mail.png" />
         <structure type="chrome_scaled_image" name="IDR_PEOPLE_SEARCH_ACTION_EMAIL_HOVER" file="common/mail_hover.png" />
         <structure type="chrome_scaled_image" name="IDR_PEOPLE_SEARCH_ACTION_EMAIL_PRESSED" file="common/mail_pressed.png" />
         <structure type="chrome_scaled_image" name="IDR_PEOPLE_SEARCH_ACTION_CHAT" file="common/chat.png" />
         <structure type="chrome_scaled_image" name="IDR_PEOPLE_SEARCH_ACTION_CHAT_HOVER" file="common/chat_hover.png" />
         <structure type="chrome_scaled_image" name="IDR_PEOPLE_SEARCH_ACTION_CHAT_PRESSED" file="common/chat_pressed.png" />
       </if>
     </structures>
   </release>
 </grit>