Automated g4 rollback of changelist 264626714.

*** Reason for rollback ***

This breaks instances in report-only Trusted-Types enforcement, where non-TrustedURL types are passed to the sinks.

w3c/trusted-types#209

*** Original change description ***

Make Closure Trusted Types integration not require TrustedURL values, as they will soon be removed from the Trusted Types API - w3c/trusted-types#204.

goog.createTrustedTypesPolicy will attempt to create a default policy allowing any value to be converted to TrustedURL.

RELNOTES: Trusted Types integrations will allow any value to be a TrustedURL via defensively creating a 'default' policy (to prepare for TrustedURL deprecation)

***

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=265699886

closure/goog/base.js

@@ -4170,21 +4170,6 @@ goog.createTrustedTypesPolicy = function(name) {
   } catch (e) {
     goog.logToConsole_(e.message);
   }
-
-  // TrustedTypes API will deprecate TrustedURLs in Chrome 78. To prepare for
-  // that, and make the Closure code emulate the post-deprecation behavior
-  // of the API, we attempt to create a default policy that blesses any value
-  // to TrustedURL. This is a best-effort attempt. If that does not succeed,
-  // the application fails close - TrustedURL values will simply be required
-  // at all relevant sinks.
-  if (goog.global.TrustedURL && policyFactory.getPolicyNames &&
-      policyFactory.getPolicyNames().indexOf('default') === -1) {
-    try {
-      policyFactory.createPolicy('default', {createURL: goog.identity_}, true);
-    } catch (e) {
-      goog.logToConsole_(e.message);
-    }
-  }
   return policy;
 };