Implement RevokePermission() method in PermissionService.

content/browser/permissions/permission_service_impl.cc

Index: content/browser/permissions/permission_service_impl.cc
diff --git a/content/browser/permissions/permission_service_impl.cc b/content/browser/permissions/permission_service_impl.cc
index bb5b027742907b8ebf25ae8d1feff364460c35ea..3c33a8c7b0bc7457c1f8f39d29a66cf2c43e9f19 100644
--- a/content/browser/permissions/permission_service_impl.cc
+++ b/content/browser/permissions/permission_service_impl.cc
@@ -121,4 +121,19 @@ void PermissionServiceImpl::HasPermission(
       embedding_origin.is_empty() ? GURL(origin) : embedding_origin));
 }
 
+void PermissionServiceImpl::RevokePermission(
+    PermissionName permission,
+    const mojo::String& origin,
+    const mojo::Callback<void(PermissionStatus)>& callback) {
+  // If the embedding_origin is empty we'll use |origin| instead.
+  GURL embedding_origin = context_->GetEmbeddingOrigin();
+
+  callback.Run(GetContentClient()->browser()->RevokePermission(
+      PermissionNameToPermissionType(permission),
+      context_->GetBrowserContext(),
+      GURL(origin),
+      embedding_origin.is_empty() ? GURL(origin) : embedding_origin));
+}
+
+
 }  // namespace content