VrShell: implement insecure content warning display

chrome/browser/browser_resources.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <grit latest_public_release="0" current_release="1" output_all_resource_defines="false">
   <outputs>
     <output filename="grit/browser_resources.h" type="rc_header">
       <emit emit_type='prepend'></emit>
     </output>
     <output filename="browser_resources.pak" type="data_package" />
   </outputs>
   <release seq="1">
     <structures>
@@ skipping 187 matching lines @@
         <include name="IDR_OFFLINE_INTERNALS_JS" file="resources\offline_pages\offline_internals.js" type="BINDATA" />
         <include name="IDR_OFFLINE_INTERNALS_BROWSER_PROXY_JS" file="resources\offline_pages\offline_internals_browser_proxy.js" type="BINDATA" />
         <include name="IDR_POPULAR_SITES_INTERNALS_HTML" file="resources\popular_sites_internals.html" allowexternalscript="true" compress="gzip" type="BINDATA" />
         <include name="IDR_POPULAR_SITES_INTERNALS_CSS" file="resources\popular_sites_internals.css" compress="gzip" type="BINDATA" />
         <include name="IDR_POPULAR_SITES_INTERNALS_JS" file="resources\popular_sites_internals.js" compress="gzip" type="BINDATA" />
         <include name="IDR_SNIPPETS_INTERNALS_HTML" file="resources\snippets_internals.html" allowexternalscript="true" compress="gzip" type="BINDATA" />
         <include name="IDR_SNIPPETS_INTERNALS_CSS" file="resources\snippets_internals.css" compress="gzip" type="BINDATA" />
         <include name="IDR_SNIPPETS_INTERNALS_JS" file="resources\snippets_internals.js" compress="gzip" type="BINDATA" />
         <!-- TODO: Enable only for VrShell, independent of Android. -->
         <if expr="enable_vr_shell">
-          <include name="IDR_VR_SHELL_UI_HTML" file="resources\vr_shell\vr_shell_ui.html" allowexternalscript="true" flattenhtml="true" compress="gzip" type="BINDATA" />
-          <include name="IDR_VR_SHELL_UI_CSS" file="resources\vr_shell\vr_shell_ui.css" compress="gzip" type="BINDATA" />
-          <include name="IDR_VR_SHELL_UI_JS" file="resources\vr_shell\vr_shell_ui.js" compress="gzip" type="BINDATA" />
+          <include name="IDR_VR_SHELL_UI_HTML" file="resources\vr_shell\vr_shell_ui.html" allowexternalscript="true" type="BINDATA" />

[Dan Beam, 2016/09/27 22:33:40]

I think if you remove flattenhtml="true", the <if> tags in the .html file will
no longer be processed

[Dan Beam, 2016/09/27 22:33:40]

i think allowexternalscript only has an effect when flattenhtml="true", so it
can now be removed

+          <include name="IDR_VR_SHELL_UI_CSS" file="resources\vr_shell\vr_shell_ui.css" type="BINDATA" />
+          <include name="IDR_VR_SHELL_UI_JS" file="resources\vr_shell\vr_shell_ui.js" type="BINDATA" />
         </if>
       </if>
       <include name="IDR_SUPERVISED_USER_INTERNALS_HTML" file="resources\supervised_user_internals.html" allowexternalscript="true" compress="gzip" type="BINDATA" />
       <include name="IDR_SUPERVISED_USER_INTERNALS_CSS" file="resources\supervised_user_internals.css" compress="gzip" type="BINDATA" />
       <include name="IDR_SUPERVISED_USER_INTERNALS_JS" file="resources\supervised_user_internals.js" compress="gzip" type="BINDATA" />
       <if expr="_google_chrome or enable_hangout_services_extension">
         <!-- Hangout Services extension, included in Google Chrome builds only. -->
         <include name="IDR_HANGOUT_SERVICES_MANIFEST" file="resources\hangout_services\manifest.json" type="BINDATA" />
       </if>
       <if expr="enable_hotwording">
@@ skipping 372 matching lines @@
       </if>
       <if expr="not is_android and not is_ios">
         <include name="IDR_IME_WINDOW_CLOSE" file="resources\input_ime\ime_window_close.png" type="BINDATA" />
         <include name="IDR_IME_WINDOW_CLOSE_C" file="resources\input_ime\ime_window_close_click.png" type="BINDATA" />
         <include name="IDR_IME_WINDOW_CLOSE_H" file="resources\input_ime\ime_window_close_hover.png" type="BINDATA" />
       </if>
       <include name="IDR_CONTENT_BROWSER_MANIFEST_OVERLAY" file="content_browser_manifest_overlay.json" type="BINDATA" />
     </includes>
   </release>
 </grit>