WebUI: Vulcanize MD Downloads at compile time using GN.

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>
       <if expr="enable_app_list">
         <structure name="IDR_APP_LIST_START_PAGE_CSS" file="resources\app_list\start_page.css" flattenhtml="true" type="chrome_html" />
         <structure name="IDR_APP_LIST_START_PAGE_HTML" file="resources\app_list\start_page.html" flattenhtml="true" type="chrome_html" />
         <structure name="IDR_APP_LIST_START_PAGE_JS" file="resources\app_list\start_page.js" flattenhtml="true" type="chrome_html" />
       </if>
-      <if expr="not is_android and not use_vulcanize">
-        <structure name="IDR_MD_DOWNLOADS_DOWNLOADS_HTML" file="resources\md_downloads\downloads.html" flattenhtml="true" allowexternalscript="true" type="chrome_html" />
-      </if>
       <if expr="enable_extensions">
         <structure name="IDR_EXTENSIONS_HTML" file="resources\extensions\extensions.html" flattenhtml="true" type="chrome_html" />
         <structure name="IDR_MD_EXTENSIONS_EXTENSIONS_HTML" file="resources\md_extensions\extensions.html" flattenhtml="true" allowexternalscript="true" type="chrome_html" />
       </if>
       <if expr="chromeos">
         <structure name="IDR_FIRST_RUN_HTML" file="resources\chromeos\first_run\first_run.html" flattenhtml="true" type="chrome_html"/>
         <structure name="IDR_FIRST_RUN_JS" file="resources\chromeos\first_run\first_run.js" flattenhtml="true" type="chrome_html" />
       </if>
       <if expr="not is_android">
         <structure name="IDR_HELP_CSS" file="resources\help\help.css" flattenhtml="true" type="chrome_html" />
@@ skipping 108 matching lines @@
       <if expr="safe_browsing_mode != 0">
         <include name="IDR_DOWNLOAD_FILE_TYPES_PB" file="${root_gen_dir}\chrome\browser\resources\safe_browsing\download_file_types.pb" use_base_dir="false" type="BINDATA" />
       </if>
       <if expr="not is_android">
         <include name="IDR_MD_DOWNLOADS_1X_INCOGNITO_MARKER_PNG" file="resources\md_downloads\1x\incognito_marker.png" type="BINDATA" />
         <include name="IDR_MD_DOWNLOADS_2X_INCOGNITO_MARKER_PNG" file="resources\md_downloads\2x\incognito_marker.png" type="BINDATA" />
         <include name="IDR_MD_DOWNLOADS_1X_NO_DOWNLOADS_PNG" file="resources\md_downloads\1x\no_downloads.png" type="BINDATA" />
         <include name="IDR_MD_DOWNLOADS_2X_NO_DOWNLOADS_PNG" file="resources\md_downloads\2x\no_downloads.png" type="BINDATA" />
         <if expr="use_vulcanize">
           <then>
-            <include name="IDR_MD_DOWNLOADS_CRISPER_JS" file="resources\md_downloads\crisper.js" flattenhtml="true" type="BINDATA" compress="gzip" />
-            <include name="IDR_MD_DOWNLOADS_VULCANIZED_HTML" file="resources\md_downloads\vulcanized.html" flattenhtml="true" allowexternalscript="true" type="BINDATA" compress="gzip" />
+            <include name="IDR_MD_DOWNLOADS_VULCANIZED_HTML" file="${root_gen_dir}\chrome\browser\resources\md_downloads\vulcanized.html" use_base_dir="false" flattenhtml="true" allowexternalscript="true" type="BINDATA" compress="gzip" />
+            <include name="IDR_MD_DOWNLOADS_CRISPER_JS" file="${root_gen_dir}\chrome\browser\resources\md_downloads\crisper.js" use_base_dir="false" flattenhtml="true" type="BINDATA" compress="gzip" />
           </then>
           <else>
+            <include name="IDR_MD_DOWNLOADS_DOWNLOADS_HTML" file="resources\md_downloads\downloads.html" flattenhtml="true" allowexternalscript="true" type="BINDATA" />
             <include name="IDR_MD_DOWNLOADS_ACTION_SERVICE_HTML" file="resources\md_downloads\action_service.html" type="BINDATA" />
             <include name="IDR_MD_DOWNLOADS_ACTION_SERVICE_JS" file="resources\md_downloads\action_service.js" type="BINDATA" />
             <include name="IDR_MD_DOWNLOADS_CONSTANTS_HTML" file="resources\md_downloads\constants.html" type="BINDATA" />
             <include name="IDR_MD_DOWNLOADS_CONSTANTS_JS" file="resources\md_downloads\constants.js" type="BINDATA" />
             <include name="IDR_MD_DOWNLOADS_DOWNLOADS_JS" file="resources\md_downloads\downloads.js" type="BINDATA" />
             <include name="IDR_MD_DOWNLOADS_I18N_SETUP_HTML" file="resources\md_downloads\i18n_setup.html" type="BINDATA" />
             <include name="IDR_MD_DOWNLOADS_ICONS_HTML" file="resources\md_downloads\icons.html" type="BINDATA" />
             <include name="IDR_MD_DOWNLOADS_ITEM_HTML" file="resources\md_downloads\item.html" type="BINDATA" />
             <include name="IDR_MD_DOWNLOADS_ITEM_JS" file="resources\md_downloads\item.js" type="BINDATA" />
             <include name="IDR_MD_DOWNLOADS_MANAGER_HTML" file="resources\md_downloads\manager.html" type="BINDATA" />
@@ skipping 469 matching lines @@
       <include name="IDR_CHROME_CONTENT_PLUGIN_MANIFEST_OVERLAY" file="chrome_content_plugin_manifest_overlay.json" type="BINDATA" />
       <include name="IDR_CHROME_CONTENT_RENDERER_MANIFEST_OVERLAY" file="chrome_content_renderer_manifest_overlay.json" type="BINDATA" />
       <include name="IDR_CHROME_CONTENT_UTILITY_MANIFEST_OVERLAY" file="chrome_content_utility_manifest_overlay.json" type="BINDATA" />
       <include name="IDR_NACL_LOADER_MANIFEST" file="../../components/nacl/loader/nacl_loader_manifest.json" type="BINDATA" />
       <if expr="is_win">
         <include name="IDR_NACL_BROKER_MANIFEST" file="../../components/nacl/broker/nacl_broker_manifest.json" type="BINDATA" />
       </if>
     </includes>
   </release>
 </grit>