Remove base::ObserverList<T>::Iter::GetNext().

ios/web/web_state/web_state_impl.mm

 // Copyright 2013 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 "ios/web/web_state/web_state_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/metrics/histogram_macros.h"
@@ skipping 457 matching lines @@
 
   delete web_ui;
   return NULL;
 }
 
 void WebStateImpl::SetContentsMimeType(const std::string& mime_type) {
   mime_type_ = mime_type;
 }
 
 bool WebStateImpl::ShouldAllowRequest(NSURLRequest* request) {
-  base::ObserverListBase<WebStatePolicyDecider>::Iterator it(&policy_deciders_);
-  WebStatePolicyDecider* policy_decider = nullptr;
-  while ((policy_decider = it.GetNext()) != nullptr) {
-    if (!policy_decider->ShouldAllowRequest(request))
+  for (auto& policy_decider : policy_deciders_) {
+    if (!policy_decider.ShouldAllowRequest(request))
       return false;
   }
   return true;
 }
 
 bool WebStateImpl::ShouldAllowResponse(NSURLResponse* response) {
-  base::ObserverListBase<WebStatePolicyDecider>::Iterator it(&policy_deciders_);
-  WebStatePolicyDecider* policy_decider = nullptr;
-  while ((policy_decider = it.GetNext()) != nullptr) {
-    if (!policy_decider->ShouldAllowResponse(response))
+  for (auto& policy_decider : policy_deciders_) {
+    if (!policy_decider.ShouldAllowResponse(response))
       return false;
   }
   return true;
 }
 
 #pragma mark - RequestTracker management
 
 void WebStateImpl::InitializeRequestTracker(
     id<CRWRequestTrackerDelegate> delegate) {
   BrowserState* browser_state = navigation_manager_.GetBrowserState();
@@ skipping 192 matching lines @@
     const LoadCommittedDetails& load_details) {
   FOR_EACH_OBSERVER(WebStateObserver, observers_,
                     NavigationItemCommitted(load_details));
 }
 
 WebState* WebStateImpl::GetWebState() {
   return this;
 }
 
 }  // namespace web