Fix WebLayer crashing in Monochrome

WebLayer was crashing in Monochrome because BundleUtils.setIsBundle()
was never called.

This looks like it was caused by http://crrev.com/c/1989243.

Bug: 901465
Change-Id: I6f2220b3def3d1783677f8a48b5b4555fd896bc0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2036267
Commit-Queue: Bo <boliu@chromium.org>
Reviewed-by: Bo <boliu@chromium.org>
Auto-Submit: Clark DuVall <cduvall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#738394}

weblayer/browser/java/org/chromium/weblayer_private/WebLayerImpl.java

@@ -20,6 +20,7 @@ import android.webkit.WebViewDelegate;
 import android.webkit.WebViewFactory;
 
 import org.chromium.base.BuildInfo;
+import org.chromium.base.BundleUtils;
 import org.chromium.base.CommandLine;
 import org.chromium.base.ContentUriUtils;
 import org.chromium.base.ContextUtils;
@@ -184,6 +185,7 @@ public final class WebLayerImpl extends IWebLayer.Stub {
         R.onResourcesLoaded(resourcesPackageId);
 
         ResourceBundle.setAvailablePakLocales(new String[] {}, ProductConfig.UNCOMPRESSED_LOCALES);
+        BundleUtils.setIsBundle(ProductConfig.IS_BUNDLE);
 
         setChildProcessCreationParams(appContext, packageInfo.packageName);