Disable vr preload to test crash fix

It looks like we are getting some crashes on VrModule.getImpl() even in
versions where we use SplitCompatAppComponentFactory. I suspect this is
due to the vr preload, so disabling to see if it stops crashes. If this
works, I'll see if there's anything we can do to prevent crashing with
the preload.

Bug: 1142589
Change-Id: I7de6c48edbb9d0a37ee271bff49295912b549d53
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2611847Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Commit-Queue: Clark DuVall <cduvall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#840329}

chrome/android/java/src/org/chromium/chrome/browser/base/SplitChromeApplication.java

@@ -95,8 +95,6 @@ public class SplitChromeApplication extends SplitCompatApplication {
         // N), the onComplete function will run immediately so it must handle the case where the
         // base context of the application has not been set yet.
         sSplitPreloader.preload(CHROME_SPLIT_NAME, (chromeContext) -> {
-            // When installed, the vr module is always loaded on startup, so preload here.
-            sSplitPreloader.preload("vr", null);
             // If the chrome module is not enabled or isolated splits are not supported,
             // chromeContext will have the same ClassLoader as the base context, so no need to
             // replace the ClassLoaders here.