Update Chromoting's build-html to check for extra/missing templates.

dialog_client.html was missing from the template list and the old build did not report an error.  This change requires that he expected list of templates be passed to the HTML generator script so that it can be verified that all the dependencies are specified.

This also moves the dialog_client template into the main template so that we include everything directly from template_main.html.

This also removes some end-tag comments that are no longer needed since the structure can be more easily seen.
BUG=

Review URL: https://codereview.chromium.org/176013002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253155 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/remoting/remoting_webapp_files.gypi b/remoting/remoting_webapp_files.gypi
index 517b85c..54e7d5b 100644
--- a/remoting/remoting_webapp_files.gypi
+++ b/remoting/remoting_webapp_files.gypi
@@ -183,9 +183,11 @@
 
     'remoting_webapp_template_files': [
       'webapp/html/butterbar.html',
+      'webapp/html/client_plugin.html',
       'webapp/html/dialog_auth.html',
+      'webapp/html/dialog_client_connect_failed.html',
+      'webapp/html/dialog_client_connecting.html',
       'webapp/html/dialog_client_host_needs_upgrade.html',
-      'webapp/html/dialog_client.html',
       'webapp/html/dialog_client_pin_prompt.html',
       'webapp/html/dialog_client_session_finished.html',
       'webapp/html/dialog_client_third_party_auth.html',