Re-apply remoting webapp html in gn

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index b51ff78b2cea25e479887b0c2f2e40ef2a781863..16e6b060b03735c118652b17916ad57ac9bd24ca 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -12,7 +12,6 @@ import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/module_args/v8.gni")
-import("//remoting/remoting_host.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
@@ -139,10 +138,6 @@ group("gn_all") {
     deps += [ "//extensions/shell:app_shell_unittests" ]
   }
 
-  if (enable_me2me_host) {
-    deps += [ "//remoting/host:remoting_me2me_host" ]
-  }
-
   if (enable_media_router) {
     deps += [
       "//chrome/browser/media/router/",
@@ -150,14 +145,8 @@ group("gn_all") {
     ]
   }
 
-  if (enable_remoting_host) {
-    deps += [
-      "//remoting:remoting_unittests",
-      "//remoting:remoting_perftests",
-      "//remoting/host",
-      "//remoting/host:remoting_start_host",
-      "//remoting/host/it2me:remote_assistance_host",
-    ]
+  if (enable_remoting) {
+    deps += [ "//remoting:remoting_all" ]
   }
 
   if (toolkit_views) {