Add UMA for recording embargo reasons and autoblocker interactions.

chrome/browser/permissions/permission_decision_auto_blocker.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/permissions/permission_decision_auto_blocker.h"
 
 #include <memory>
 
 #include "base/feature_list.h"
 #include "base/memory/ptr_util.h"
@@ skipping 253 matching lines @@
       dismissal_embargo_days > 0) {
     g_dismissal_embargo_days = dismissal_embargo_days;
   }
 }
 
 void PermissionDecisionAutoBlocker::UpdateEmbargoedStatus(
     content::PermissionType permission,
     const GURL& request_origin,
     content::WebContents* web_contents,
     base::Callback<void(bool)> callback) {
-  // Check if origin is currently under embargo for the requested permission.
-  if (IsUnderEmbargo(permission, request_origin)) {
-    callback.Run(true /* permission_blocked */);
-    return;
-  }
+  DCHECK(!IsUnderEmbargo(permission, request_origin));
 
   if (base::FeatureList::IsEnabled(features::kPermissionsBlacklist) &&
       db_manager_) {
     // The CheckSafeBrowsingResult callback won't be called if the profile is
     // destroyed before a result is received. In that case this object will have
     // been destroyed by that point.
     PermissionBlacklistClient::CheckSafeBrowsingBlacklist(
         db_manager_, permission, request_origin, web_contents,
         safe_browsing_timeout_,
         base::Bind(&PermissionDecisionAutoBlocker::CheckSafeBrowsingResult,
@@ skipping 77 matching lines @@
         scoped_refptr<safe_browsing::SafeBrowsingDatabaseManager> db_manager,
         int timeout) {
   db_manager_ = db_manager;
   safe_browsing_timeout_ = timeout;
 }
 
 void PermissionDecisionAutoBlocker::SetClockForTesting(
     std::unique_ptr<base::Clock> clock) {
   clock_ = std::move(clock);
 }