fix to run Webview Policy initialization on the UI thread

components/policy/android/java/src/org/chromium/policy/AbstractAppRestrictionsProvider.java

Index: components/policy/android/java/src/org/chromium/policy/AbstractAppRestrictionsProvider.java
diff --git a/components/policy/android/java/src/org/chromium/policy/AbstractAppRestrictionsProvider.java b/components/policy/android/java/src/org/chromium/policy/AbstractAppRestrictionsProvider.java
index 64f886b169d84764d0a02b7cdcf3b3c01a8bf122..45b7c9ce86939aa9287bab2c4ed76d3c87dcf23a 100644
--- a/components/policy/android/java/src/org/chromium/policy/AbstractAppRestrictionsProvider.java
+++ b/components/policy/android/java/src/org/chromium/policy/AbstractAppRestrictionsProvider.java
@@ -96,7 +96,12 @@ public void refresh() {
 
         final Bundle cachedResult = getCachedPolicies();
         if (cachedResult != null) {
-            notifySettingsAvailable(cachedResult);
+            ThreadUtils.runOnUiThread(new Runnable() {
+                @Override
+                public void run() {
+                    notifySettingsAvailable(cachedResult);
+                }
+            });
         }
 
         mExecutor.execute(new Runnable() {