Fullscreen bubble: Draw a white box around "ESC" in "Press ESC to exit".

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 2b232e1ac7d57af0e8935fadba8b803e06980d73..be7e41c1b4b2ae26994f934bf6e9741b5447f888 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -13296,9 +13296,12 @@ Some features may be unavailable.  Please check that the profile exists and you
       <message name="IDS_FULLSCREEN_ENTERED_MOUSELOCK" desc="Text displayed in the bubble to inform the user that the page has locked the mouse. (No domain to be shown, e.g. from filesystem page)">
         This page has disabled your mouse cursor.
       </message>
-      <message name="IDS_FULLSCREEN_PRESS_ESC_TO_EXIT" desc="Text displayed in the bubble to tell users how to return to normal mode">
+      <message name="IDS_FULLSCREEN_PRESS_ESC_TO_EXIT_SENTENCE" desc="Text displayed in the bubble to tell users how to return to normal mode.">
         Press <ph name="ACCELERATOR">$1<ex>Esc</ex></ph> to exit.
       </message>
+      <message name="IDS_FULLSCREEN_PRESS_ESC_TO_EXIT" desc="Text displayed in the bubble to tell users how to return to normal mode. Please surround the name of the key (e.g. 'Esc') in pipe characters so it can be rendered as a key.">
+        Press |<ph name="ACCELERATOR">$1<ex>Esc</ex></ph>| to exit
+      </message>
       <message name="IDS_FULLSCREEN_ALLOW" desc="Text in the bubble button that grants permission for a site to enter fullscreen and/or lock the mouse.">
         Allow
       </message>