Adds a skeleton component app for Always-On Hotwording opt-in flow.

chrome/browser/resources/component_extension_resources.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <!-- This comment is only here because changes to resources are not picked up
      without changes to the corresponding grd file.  -->
 <grit latest_public_release="0" current_release="1">
   <outputs>
     <output filename="grit/component_extension_resources.h" type="rc_header">
       <emit emit_type='prepend'></emit>
     </output>
     <output filename="grit/component_extension_resources_map.cc" type="resource_file_map_source" />
     <output filename="grit/component_extension_resources_map.h" type="resource_map_header" />
     <output filename="component_extension_resources.pak" type="data_package" />
   </outputs>
   <release seq="1">
     <structures>
       <structure name="IDR_BOOKMARK_MANAGER_MAIN" file="bookmark_manager/main.html" flattenhtml="true" allowexternalscript="true" type="chrome_html" />
+      <structure name="IDR_HOTWORD_AUDIO_VERIFICATION_MAIN" file="hotword_audio_verification/main.html" flattenhtml="true" allowexternalscript="true" type="chrome_html" />
       <if expr="chromeos">
         <structure name="IDR_WALLPAPER_MANAGER_MAIN" file="chromeos/wallpaper_manager/main.html" flattenhtml="true" allowexternalscript="true" type="chrome_html" />
         <if expr="not _google_chrome">
           <structure name="IDR_FIRST_RUN_DIALOG_MAIN" file="chromeos/first_run/app/main.html" flattenhtml="true" allowexternalscript="true" type="chrome_html" variables="GREETING_IMAGE=disabled" expand_variables="true"/>
         </if>
         <if expr="_google_chrome">
           <structure name="IDR_FIRST_RUN_DIALOG_MAIN" file="chromeos/first_run/app/main.html" flattenhtml="true" allowexternalscript="true" type="chrome_html" variables="GREETING_IMAGE=enabled" expand_variables="true"/>
         </if>
       </if>
     </structures>
@@ skipping 26 matching lines @@
       <include name="IDR_GAIA_AUTH_UTIL_JS" file="gaia_auth/util.js" type="BINDATA" />
       <include name="IDR_GAIA_AUTH_BACKGROUND_JS" file="gaia_auth/background.js" type="BINDATA" />
       <include name="IDR_GAIA_AUTH_SAML_INJECTED_JS" file="gaia_auth/saml_injected.js" type="BINDATA" />
       <include name="IDR_GAIA_AUTH_CHANNEL_JS" file="gaia_auth/channel.js" type="BINDATA" />
       <!-- Hangout Services extension, included in Google Chrome builds only. -->
       <if expr="_google_chrome or enable_hangout_services_extension">
         <include name="IDR_HANGOUT_SERVICES_BACKGROUND_HTML" file="hangout_services/background.html" type="BINDATA" />
         <include name="IDR_HANGOUT_SERVICES_THUNK_JS" file="hangout_services/thunk.js" type="BINDATA" />
       </if>
       <if expr="enable_extensions">
+        <!-- Hotword Audio Verification extension -->
+        <include name="IDR_HOTWORD_AUDIO_VERIFICATION_BACKGROUND_JS" file="hotword_audio_verification/background.js" type="BINDATA" />
+
         <!-- Hotword Helper extension -->
         <include name="IDR_HOTWORD_HELPER_AUDIO_CLIENT_JS" file="hotword_helper/audio_client.js" type="BINDATA" />
         <include name="IDR_HOTWORD_HELPER_MANAGER_JS" file="hotword_helper/manager.js" type="BINDATA" />
 
         <!-- (Experimental) hotword triggering extension -->
         <include name="IDR_HOTWORD_MANAGER_JS" file="hotword/manager.js" type="BINDATA" />
       </if>
       <if expr="not is_android">
         <include name="IDR_FEEDBACK_DEFAULT_HTML" file="feedback/html/default.html" flattenhtml="true" allowexternalscript="true" type="BINDATA" />
         <include name="IDR_FEEDBACK_EVENT_HANDLER_JS" file="feedback/js/event_handler.js" flattenhtml="true" type="BINDATA" />
@@ skipping 120 matching lines @@
       <!-- The next two files have a .png extension since grit for some reason
            won't compile these files in if they are named .nmf/.pexe or
            anything remotely similar to their actual extension. Naming these
            .js or .html breaks all kinds of presubmit checks, hence .png seems
            to be the only viable option at the moment. -->
       <include name="IDR_WHISPERNET_PROXY_WHISPERNET_PROXY_PROXY_NMF" file="whispernet_proxy/whispernet_proxy.nmf.png" type="BINDATA" />
       <include name="IDR_WHISPERNET_PROXY_WHISPERNET_PROXY_PROXY_PEXE" file="whispernet_proxy/whispernet_proxy_pnacl.pexe.png" type="BINDATA" />
     </includes>
   </release>
 </grit>