arc: Use incognito profile for OptIn and cookie fetcher

chrome/browser/browser_resources.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <grit latest_public_release="0" current_release="1">
   <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 371 matching lines @@
         <include name="IDR_CERT_MANAGER_DIALOG_HTML" file="resources\chromeos\certificate_manager_dialog.html" flattenhtml="true" type="BINDATA" />
         <include name="IDR_BLUETOOTH_PAIR_DEVICE_HTML" file="resources\chromeos\bluetooth_pair_device.html" flattenhtml="true" type="BINDATA" />
         <include name="IDR_SIM_UNLOCK_HTML" file="resources\chromeos\sim_unlock.html" flattenhtml="true" type="BINDATA" />
         <include name="IDR_SLOW_HTML" file="resources\chromeos\slow.html" flattenhtml="true" type="BINDATA" />
         <include name="IDR_SLOW_JS" file="resources\chromeos\slow.js" type="BINDATA" />
       </if>
       <if expr="chromeos">
         <include name="IDR_DEMO_APP_MANIFEST" file="resources\chromeos\demo_app\manifest.json" type="BINDATA" />
         <include name="IDR_WALLPAPERMANAGER_MANIFEST" file="resources\chromeos\wallpaper_manager\manifest.json" type="BINDATA" />
         <include name="IDR_FIRST_RUN_DIALOG_MANIFEST" file="resources\chromeos\first_run\app/manifest.json" type="BINDATA" />
+        <include name="IDR_ARC_OPT_IN_MANIFEST" file="resources\chromeos\arc_opt_in\manifest.json" type="BINDATA" />

[xiyuan, 2016/02/11 17:57:20]

nit: arc_opt_in is very specific. Since we want to extends the app to do more
stuff in the future, how about give the app/dir a more general name, e.g.
arc_support?

[khmel, 2016/02/12 02:45:23]

Agree!

       </if>
       <if expr="chromeos and _google_chrome">
         <include name="IDR_GENIUS_APP_MANIFEST" file="resources\chromeos\genius_app\manifest.json" type="BINDATA" />
         <include name="IDR_HELP_MANIFEST" file="resources\help_app\manifest.json" type="BINDATA" />
         <include name="IDR_QUICKOFFICE_MANIFEST" file="resources\chromeos\quickoffice\manifest.json" type="BINDATA" />
       </if>
       <if expr="is_win">
         <include name="IDR_SET_AS_DEFAULT_BROWSER_JS" file="resources\set_as_default_browser.js" flattenhtml="true" type="BINDATA" />
         <include name="IDR_SET_AS_DEFAULT_BROWSER_HTML" file="resources\set_as_default_browser.html" flattenhtml="true" allowexternalscript="true" type="BINDATA" />
       </if>
@@ skipping 78 matching lines @@
         </if>
         <include name="IDR_BRAILLE_MANIFEST" file="resources\chromeos\braille_ime\manifest.json" type="BINDATA" />
       </if>
       <include name="IDR_WHISPERNET_PROXY_MANIFEST" file="resources\whispernet_proxy\manifest.json" type="BINDATA" />
       <if expr="enable_media_router">
         <part file="media_router_resources.grdp" />
       </if>
     </includes>
   </release>
 </grit>