Reduce usage of FOR_EACH_OBSERVER macro in components/

components/proxy_config/pref_proxy_config_tracker_impl_unittest.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/proxy_config/pref_proxy_config_tracker_impl.h"
 
 #include <memory>
 #include <string>
 
 #include "base/files/file_path.h"
@@ skipping 22 matching lines @@
  public:
   TestProxyConfigService(const net::ProxyConfig& config,
                          ConfigAvailability availability)
       : config_(config),
         availability_(availability) {}
 
   void SetProxyConfig(const net::ProxyConfig config,
                       ConfigAvailability availability) {
     config_ = config;
     availability_ = availability;
-    FOR_EACH_OBSERVER(net::ProxyConfigService::Observer, observers_,
-                      OnProxyConfigChanged(config, availability));
+    for (net::ProxyConfigService::Observer& observer : observers_)
+      observer.OnProxyConfigChanged(config, availability);
   }
 
  private:
   void AddObserver(net::ProxyConfigService::Observer* observer) override {
     observers_.AddObserver(observer);
   }
 
   void RemoveObserver(net::ProxyConfigService::Observer* observer) override {
     observers_.RemoveObserver(observer);
   }
@@ skipping 209 matching lines @@
   base::RunLoop().RunUntilIdle();
 
   // Test if we actually use the system setting, which is |kFixedPacUrl|.
   net::ProxyConfig actual_config;
   EXPECT_EQ(net::ProxyConfigService::CONFIG_VALID,
             proxy_config_service_->GetLatestProxyConfig(&actual_config));
   EXPECT_EQ(GURL(kFixedPacUrl), actual_config.pac_url());
 }
 
 }  // namespace