Remove usage of base::ObserverList<T>::Iter::GetNext() in //ppapi.

ppapi/proxy/ppapi_proxy_test.cc

 // Copyright (c) 2012 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 "ppapi/proxy/ppapi_proxy_test.h"
 
 #include <tuple>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 49 matching lines @@
 // We assume that only 1 harness's GetInterface function will ever support a
 // given interface name. In practice, there will either be only 1 GetInterface
 // handler (for PluginProxyTest or HostProxyTest), or there will be only 2
 // GetInterface handlers (for TwoWayTest).  In the latter case, one handler is
 // for the PluginProxyTestHarness and should only respond for PPP interfaces,
 // and the other handler is for the HostProxyTestHarness which should only
 // ever respond for PPB interfaces.
 base::ObserverList<ProxyTestHarnessBase> get_interface_handlers_;
 
 const void* MockGetInterface(const char* name) {
-  base::ObserverList<ProxyTestHarnessBase>::Iterator it(
-      &get_interface_handlers_);
-  while (ProxyTestHarnessBase* observer = it.GetNext()) {
-    const void* interface = observer->GetInterface(name);
+  for (auto& observer : get_interface_handlers_) {
+    const void* interface = observer.GetInterface(name);
     if (interface)
       return interface;
   }
   if (strcmp(name, PPB_PROXY_PRIVATE_INTERFACE) == 0)
     return &ppb_proxy_private;
   return NULL;
 }
 
 void SetUpRemoteHarness(ProxyTestHarnessBase* harness,
                         const IPC::ChannelHandle& handle,
@@ skipping 500 matching lines @@
       base::WaitableEvent::ResetPolicy::MANUAL,
       base::WaitableEvent::InitialState::NOT_SIGNALED);
   plugin_thread_.task_runner()->PostTask(
       FROM_HERE, base::Bind(&RunTaskOnRemoteHarness, task, &task_complete));
   task_complete.Wait();
 }
 
 
 }  // namespace proxy
 }  // namespace ppapi