Implement RevokePermission() method in PermissionService.

content/browser/permissions/permission_service_impl.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 "content/browser/permissions/permission_service_impl.h"
 
 #include "content/public/browser/content_browser_client.h"
 
 namespace content {
 
@@ skipping 104 matching lines @@
   // If the embedding_origin is empty we'll use |origin| instead.
   GURL embedding_origin = context_->GetEmbeddingOrigin();
 
   callback.Run(GetContentClient()->browser()->GetPermissionStatus(
       PermissionNameToPermissionType(permission),
       context_->GetBrowserContext(),
       GURL(origin),
       embedding_origin.is_empty() ? GURL(origin) : embedding_origin));
 }
 
+void PermissionServiceImpl::RevokePermission(
+    PermissionName permission,
+    const mojo::String& origin,
+    const mojo::Callback<void(PermissionStatus)>& callback) {
+  GURL origin_url(origin);
+  PermissionType permission_type = PermissionNameToPermissionType(permission);
+  PermissionStatus status = GetPermissionStatus(permission_type, origin_url);
+
+  if (status != PERMISSION_STATUS_GRANTED)
+    callback.Run(status);
+
+  ResetPermissionStatus(permission_type, origin_url);
+
+  callback.Run(GetPermissionStatus(permission_type, origin_url));
+}
+
+PermissionStatus PermissionServiceImpl::GetPermissionStatus(PermissionType type,
+                                                            GURL origin) {

[mlamouri (slow - plz ping), 2015/01/26 10:38:17]

Should you re-use that method in ::HasPermission()?

[timvolodine, 2015/01/30 14:07:47]

Yes. done.

+  // If the embedding_origin is empty we'll use |origin| instead.
+  GURL embedding_origin = context_->GetEmbeddingOrigin();
+  return GetContentClient()->browser()->GetPermissionStatus(
+      type, context_->GetBrowserContext(), origin,
+      embedding_origin.is_empty() ? origin : embedding_origin);
+}
+
+void PermissionServiceImpl::ResetPermissionStatus(PermissionType type,
+                                                  GURL origin) {
+  // If the embedding_origin is empty we'll use |origin| instead.
+  GURL embedding_origin = context_->GetEmbeddingOrigin();
+  GetContentClient()->browser()->ResetPermission(
+      type, context_->GetBrowserContext(), origin,
+      embedding_origin.is_empty() ? origin : embedding_origin);
+}
+
 }  // namespace content