Update overlay cast buttons for clank, part 1 of 3.

public/blink_image_resources.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <grit latest_public_release="0" current_release="1">
   <outputs>
     <output filename="grit/blink_image_resources.h" type="rc_header" context="default_100_percent">
       <emit emit_type='prepend'></emit>
     </output>
     <output filename="blink_image_resources_100_percent.pak" type="data_package" context="default_100_percent" />
     <output filename="blink_image_resources_200_percent.pak" type="data_package" context="default_200_percent" />
   </outputs>
   <release seq="1">
@@ skipping 43 matching lines @@
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_FULLSCREEN_BUTTON_DOWN" file="blink/mediaplayer_fullscreen_down.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_FULLSCREEN_BUTTON_DISABLED" file="blink/mediaplayer_fullscreen_disabled.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_ENTER_FULLSCREEN_BUTTON" file="blink/mediaplayer_enter_fullscreen.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_EXIT_FULLSCREEN_BUTTON" file="blink/mediaplayer_exit_fullscreen.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_CAST_BUTTON_OFF" file="blink/mediaplayer_cast_off.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_CAST_BUTTON_OFF_NEW" file="blink/mediaplayer_cast_off_new.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_CAST_BUTTON_ON" file="blink/mediaplayer_cast_on.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_CAST_BUTTON_ON_NEW" file="blink/mediaplayer_cast_on_new.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_OVERLAY_CAST_BUTTON_OFF" file="blink/mediaplayer_overlay_cast_off.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_OVERLAY_CAST_BUTTON_OFF_NEW" file="blink/mediaplayer_overlay_cast_off_new.png" />
+      <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_OVERLAY_CAST_BUTTON_ON_NEW" file="blink/mediaplayer_overlay_cast_on_new.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_OVERLAY_PLAY_BUTTON" file="blink/mediaplayer_overlay_play.png" />
       <structure type="chrome_scaled_image" name="IDR_MEDIAPLAYER_OVERLAY_PLAY_BUTTON_NEW" file="blink/mediaplayer_overlay_play_new.png" />
       <structure type="chrome_scaled_image" name="IDR_SEARCH_CANCEL" file="blink/search_cancel.png" />
       <structure type="chrome_scaled_image" name="IDR_SEARCH_CANCEL_PRESSED" file="blink/search_cancel_pressed.png" />
       <structure type="chrome_scaled_image" name="IDR_SEARCH_MAGNIFIER" file="blink/search_magnifier.png" />
       <structure type="chrome_scaled_image" name="IDR_SEARCH_MAGNIFIER_RESULTS" file="blink/search_magnifier_results.png" />
       <structure type="chrome_scaled_image" name="IDR_TEXTAREA_RESIZER" file="blink/textarea_resize_corner.png" />
       <structure type="chrome_scaled_image" name="IDR_PASSWORD_GENERATION_ICON" file="blink/password_generation.png" />
       <structure type="chrome_scaled_image" name="IDR_PASSWORD_GENERATION_ICON_HOVER" file="blink/password_generation_hover.png" />
     </structures>
   </release>
 </grit>