Speculative fix for failing Chromevox tests on chromeos-dbg

NOTRY=true
TBR=avi@chromium.org

Bug: 872474, 872258
Change-Id: I891cb4297476ab14d15878bcebafb109a5c3c60c
Reviewed-on: https://chromium-review.googlesource.com/1168472Reviewed-by: David Tseng <dtseng@chromium.org>
Commit-Queue: David Tseng <dtseng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#581725}

chrome/browser/resources/chromeos/chromevox/BUILD.gn

@@ -14,7 +14,7 @@ assert(is_chromeos)
 declare_args() {
   # Whether to compress the main Chromevox javascript files or load the
   # modules individually from source files.
-  chromevox_compress_js = !is_debug
+  chromevox_compress_js = true
 }
 
 closure_library_dir =

chrome/browser/resources/chromeos/chromevox/cvox2/background/background.html

 <!-- Components to load uncompressed ChromeVox -->
-<script src="../../closure/base.js"></script>
-<script src="../../deps.js"></script>
+<!--
+  <script src="../../closure/base.js"></script>
+  <script src="../../deps.js"></script>
+-->
 
 <!-- ChromeVox Next -->
-<script src="loader.js"></script>
+<!-- <script src="loader.js"></script> -->
 <script src="../../chromeVox2ChromeBackgroundScript.js"></script>
 
 <!-- Third party -->