Use __CLASS__ instead of hard-coding class names

Summary: Use `__CLASS__` instead of hard-coding class names. Depends on D12605.

Test Plan: Eyeball it.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: hach-que, Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D12806

Author: joshuaspence

src/aphront/AphrontRequest.php

@@ -650,7 +650,7 @@ public static function getHTTPHeader($name, $default = null, $data = null) {
    * safe.
    */
   public function isProxiedClusterRequest() {
-    return (bool)AphrontRequest::getHTTPHeader('X-Phabricator-Cluster');
+    return (bool)self::getHTTPHeader('X-Phabricator-Cluster');
   }
 
 

src/aphront/response/AphrontProxyResponse.php

@@ -65,7 +65,10 @@ abstract public function reduceProxyResponse();
 
   final public function buildResponseString() {
     throw new Exception(
-      'AphrontProxyResponse must implement reduceProxyResponse().');
+      pht(
+        '%s must implement %s.',
+        __CLASS__,
+        'reduceProxyResponse()'));
   }
 
 }