diff --git a/src/applications/flag/controller/PhabricatorFlagDeleteController.php b/src/applications/flag/controller/PhabricatorFlagDeleteController.php
--- a/src/applications/flag/controller/PhabricatorFlagDeleteController.php
+++ b/src/applications/flag/controller/PhabricatorFlagDeleteController.php
@@ -2,22 +2,17 @@
 
 final class PhabricatorFlagDeleteController extends PhabricatorFlagController {
 
-  private $id;
 
-  public function willProcessRequest(array $data) {
-    $this->id = $data['id'];
-  }
-
-  public function processRequest() {
-    $request = $this->getRequest();
-    $user = $request->getUser();
+  public function handleRequest(AphrontRequest $request) {
+    $viewer = $request->getViewer();
+    $id = $request->getURIData('id');
 
-    $flag = id(new PhabricatorFlag())->load($this->id);
+    $flag = id(new PhabricatorFlag())->load($id);
     if (!$flag) {
       return new Aphront404Response();
     }
 
-    if ($flag->getOwnerPHID() != $user->getPHID()) {
+    if ($flag->getOwnerPHID() != $viewer->getPHID()) {
       return new Aphront400Response();
     }
 
diff --git a/src/applications/flag/controller/PhabricatorFlagEditController.php b/src/applications/flag/controller/PhabricatorFlagEditController.php
--- a/src/applications/flag/controller/PhabricatorFlagEditController.php
+++ b/src/applications/flag/controller/PhabricatorFlagEditController.php
@@ -2,19 +2,12 @@
 
 final class PhabricatorFlagEditController extends PhabricatorFlagController {
 
-  private $phid;
+  public function handleRequest(AphrontRequest $request) {
+    $viewer = $request->getViewer();
+    $phid = $request->getURIData('phid');
 
-  public function willProcessRequest(array $data) {
-    $this->phid = $data['phid'];
-  }
-
-  public function processRequest() {
-    $request = $this->getRequest();
-    $user = $request->getUser();
-
-    $phid = $this->phid;
     $handle = id(new PhabricatorHandleQuery())
-      ->setViewer($user)
+      ->setViewer($viewer)
       ->withPHIDs(array($phid))
       ->executeOne();
 
@@ -22,14 +15,14 @@
       return new Aphront404Response();
     }
 
-    $flag = PhabricatorFlagQuery::loadUserFlag($user, $phid);
+    $flag = PhabricatorFlagQuery::loadUserFlag($viewer, $phid);
 
     if (!$flag) {
       $flag = new PhabricatorFlag();
-      $flag->setOwnerPHID($user->getPHID());
+      $flag->setOwnerPHID($viewer->getPHID());
       $flag->setType($handle->getType());
       $flag->setObjectPHID($handle->getPHID());
-      $flag->setReasonPHID($user->getPHID());
+      $flag->setReasonPHID($viewer->getPHID());
     }
 
     if ($request->isDialogFormPost()) {
@@ -43,7 +36,7 @@
     $type_name = $handle->getTypeName();
 
     $dialog = new AphrontDialogView();
-    $dialog->setUser($user);
+    $dialog->setUser($viewer);
 
     $dialog->setTitle(pht('Flag %s', $type_name));
 
diff --git a/src/applications/flag/controller/PhabricatorFlagListController.php b/src/applications/flag/controller/PhabricatorFlagListController.php
--- a/src/applications/flag/controller/PhabricatorFlagListController.php
+++ b/src/applications/flag/controller/PhabricatorFlagListController.php
@@ -2,19 +2,16 @@
 
 final class PhabricatorFlagListController extends PhabricatorFlagController {
 
-  private $queryKey;
-
   public function shouldAllowPublic() {
     return true;
   }
 
-  public function willProcessRequest(array $data) {
-    $this->queryKey = idx($data, 'queryKey');
-  }
+  public function handleRequest(AphrontRequest $request) {
+    $viewer = $request->getViewer();
+    $querykey = $request->getURIData('queryKey');
 
-  public function processRequest() {
     $controller = id(new PhabricatorApplicationSearchController())
-      ->setQueryKey($this->queryKey)
+      ->setQueryKey($querykey)
       ->setSearchEngine(new PhabricatorFlagSearchEngine())
       ->setNavigation($this->buildSideNavView());