Modernize more Diffusion controllers

Summary: Ref T4245. Standardize how context is read, minor updates / modernizations / consistency tweaks.

Test Plan:
  - Viewed a change.
  - Viewed brnaches.
  - Edited a commit.
  - Viewed tags.
  - Viewed history.
  - Added, edited and deleted a mirror.
  - Viewed push events.
  - Viewed a particular event.
  - Viewed ref disambiguation.
  - Viewed repository list.
  - Ran automation test.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T4245

Differential Revision: https://secure.phabricator.com/D14944

src/applications/diffusion/controller/DiffusionRefTableController.php

@@ -6,9 +6,13 @@ final class DiffusionRefTableController extends DiffusionController {
     return true;
   }
 
-  protected function processDiffusionRequest(AphrontRequest $request) {
-    $viewer = $this->getViewer();
+  public function handleRequest(AphrontRequest $request) {
+    $response = $this->loadDiffusionContext();
+    if ($response) {
+      return $response;
+    }
 
+    $viewer = $this->getViewer();
     $drequest = $this->getDiffusionRequest();
     $repository = $drequest->getRepository();
 
@@ -132,18 +136,15 @@ final class DiffusionRefTableController extends DiffusionController {
     $crumbs = $this->buildCrumbs(array());
     $crumbs->addTextCrumb(pht('Refs'));
 
-    return $this->buildApplicationPage(
-      array(
-        $crumbs,
-        $content,
-      ),
-      array(
-        'title' => array(
-          pht('Refs'),
-          $repository->getMonogram(),
+    return $this->newPage()
+      ->setTitle(
+        array(
           $ref_name,
-        ),
-      ));
+          pht('Ref'),
+          $repository->getDisplayName(),
+        ))
+      ->setCrumbs($crumbs)
+      ->appendChild($content);
   }
 
 }