Implement RevokePermission() method in PermissionService.

chrome/browser/content_settings/permission_context_base.cc

 // Copyright 2014 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/content_settings/permission_context_base.h"
 
 #include "base/logging.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/content_settings/permission_bubble_request_impl.h"
 #include "chrome/browser/content_settings/permission_context_uma_util.h"
@@ skipping 37 matching lines @@
                    callback);
 }
 
 ContentSetting PermissionContextBase::GetPermissionStatus(
     const GURL& requesting_origin,
     const GURL& embedding_origin) const {
   return profile_->GetHostContentSettingsMap()->GetContentSetting(
       requesting_origin, embedding_origin, permission_type_, std::string());
 }
 
+void PermissionContextBase::ResetPermission(
+    const GURL& requesting_origin,
+    const GURL& embedding_origin) {
+  profile_->GetHostContentSettingsMap()->SetContentSetting(
+      ContentSettingsPattern::FromURLNoWildcard(requesting_origin),
+      ContentSettingsPattern::FromURLNoWildcard(embedding_origin),
+      permission_type_, std::string(), CONTENT_SETTING_DEFAULT);
+}
+
 void PermissionContextBase::CancelPermissionRequest(
     content::WebContents* web_contents,
     const PermissionRequestID& id) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
   if (PermissionBubbleManager::Enabled()) {
     PermissionBubbleRequest* cancelling =
         pending_bubbles_.get(id.ToString());
     if (cancelling != NULL && web_contents != NULL &&
         PermissionBubbleManager::FromWebContents(web_contents) != NULL) {
@@ skipping 145 matching lines @@
                                                  bool allowed) {
   DCHECK_EQ(requesting_origin, requesting_origin.GetOrigin());
   DCHECK_EQ(embedding_origin, embedding_origin.GetOrigin());
   ContentSetting content_setting =
       allowed ? CONTENT_SETTING_ALLOW : CONTENT_SETTING_BLOCK;
   profile_->GetHostContentSettingsMap()->SetContentSetting(
       ContentSettingsPattern::FromURLNoWildcard(requesting_origin),
       ContentSettingsPattern::FromURLNoWildcard(embedding_origin),
       permission_type_, std::string(), content_setting);
 }