Fix some account profile image derps

Summary: Ref T1536. Several derps here.

Test Plan:
Oh hey this works now:

{F46610}

Reviewers: chad, btrahan

Reviewed By: chad

CC: aran

Maniphest Tasks: T1536

Differential Revision: https://secure.phabricator.com/D6211

src/applications/auth/provider/PhabricatorAuthProvider.php

@@ -150,12 +150,15 @@ abstract class PhabricatorAuthProvider {
       // PhabricatorFile right now. The storage will get shared, so the impact
       // here is negligible.
 
-      $image_uri = $account->getAccountImageURI();
+      $image_uri = $adapter->getAccountImageURI();
+
+      $unguarded = AphrontWriteGuard::beginScopedUnguardedWrites();
         $image_file = PhabricatorFile::newFromFileDownload(
           $image_uri,
           array(
             'name' => $name,
           ));
+      unset($unguarded);
 
       $account->setProfileImagePHID($image_file->getPHID());
     } catch (Exception $ex) {

src/applications/auth/view/PhabricatorAuthAccountView.php

@@ -95,7 +95,7 @@ final class PhabricatorAuthAccountView extends AphrontView {
     $image_uri = PhabricatorUser::getDefaultProfileImageURI();
     if ($account->getProfileImagePHID()) {
       $image = id(new PhabricatorFileQuery())
-        ->setUser(PhabricatorUser::getOmnipotentUser())
+        ->setViewer(PhabricatorUser::getOmnipotentUser())
         ->withPHIDs(array($account->getProfileImagePHID()))
         ->executeOne();
       if ($image) {