Added web::GetCommittedItemWithUniqueID function.

ios/web/net/crw_ssl_status_updater.mm

Index: ios/web/net/crw_ssl_status_updater.mm
diff --git a/ios/web/net/crw_ssl_status_updater.mm b/ios/web/net/crw_ssl_status_updater.mm
index 9dee9036cec439d80e81e4c5eee05347d363e293..7840caa43da5e6a7b9b8a9bfc80b4237373ecc7e 100644
--- a/ios/web/net/crw_ssl_status_updater.mm
+++ b/ios/web/net/crw_ssl_status_updater.mm
@@ -6,6 +6,7 @@
 
 #import "base/mac/scoped_nsobject.h"
 #import "base/strings/sys_string_conversions.h"
+#include "ios/web/navigation/navigation_manager_util.h"
 #import "ios/web/public/navigation_item.h"
 #import "ios/web/public/navigation_manager.h"
 #include "ios/web/public/ssl_status.h"
@@ -125,29 +126,25 @@ using web::SecurityStyle;
                                 host:(NSString*)host
                    withSecurityStyle:(SecurityStyle)style
                           certStatus:(CertStatus)certStatus {
-  // The searched item almost always be the last one, so walk backward rather
-  // than forward.
-  for (int i = _navigationManager->GetItemCount() - 1; 0 <= i; i--) {
-    web::NavigationItem* item = _navigationManager->GetItemAtIndex(i);
-    if (item->GetUniqueID() != navigationItemID)
-      continue;
-
-    // NavigationItem's UniqueID is preserved even after redirects, so
-    // checking that cert and URL match is necessary.
-    scoped_refptr<net::X509Certificate> cert(web::CreateCertFromTrust(trust));
-    std::string GURLHost = base::SysNSStringToUTF8(host);
-    web::SSLStatus& SSLStatus = item->GetSSL();
-    if (item->GetURL().SchemeIsCryptographic() && !!SSLStatus.certificate &&
-        SSLStatus.certificate->Equals(cert.get()) &&
-        item->GetURL().host() == GURLHost) {
-      web::SSLStatus previousSSLStatus = item->GetSSL();
-      SSLStatus.cert_status = certStatus;
-      SSLStatus.security_style = style;
-      if (!previousSSLStatus.Equals(SSLStatus)) {
-        [self didChangeSSLStatusForNavigationItem:item];
-      }
-    }
+  web::NavigationItem* item =
+      web::GetCommittedItemWithUniqueID(_navigationManager, navigationItemID);
+  if (!item)
     return;
+
+  // NavigationItem's UniqueID is preserved even after redirects, so
+  // checking that cert and URL match is necessary.
+  scoped_refptr<net::X509Certificate> cert(web::CreateCertFromTrust(trust));
+  std::string GURLHost = base::SysNSStringToUTF8(host);
+  web::SSLStatus& SSLStatus = item->GetSSL();
+  if (item->GetURL().SchemeIsCryptographic() && !!SSLStatus.certificate &&
+      SSLStatus.certificate->Equals(cert.get()) &&
+      item->GetURL().host() == GURLHost) {
+    web::SSLStatus previousSSLStatus = item->GetSSL();
+    SSLStatus.cert_status = certStatus;
+    SSLStatus.security_style = style;
+    if (!previousSSLStatus.Equals(SSLStatus)) {
+      [self didChangeSSLStatusForNavigationItem:item];
+    }
   }
 }