Remove legacy StartsWithASCII function.

components/autofill/core/browser/autofill_download_manager.cc

Index: components/autofill/core/browser/autofill_download_manager.cc
diff --git a/components/autofill/core/browser/autofill_download_manager.cc b/components/autofill/core/browser/autofill_download_manager.cc
index efcabc734649e72428daecb0ace111d694c8dd0c..c92217a1ae129b4f6ed6b63cb011741e942e57f5 100644
--- a/components/autofill/core/browser/autofill_download_manager.cc
+++ b/components/autofill/core/browser/autofill_download_manager.cc
@@ -272,9 +272,9 @@ void AutofillDownloadManager::OnURLFetchComplete(
       case kHttpBadGateway:
         if (!source->GetResponseHeaders()->EnumerateHeader(NULL, "server",
                                                            &server_header) ||
-            base::StartsWithASCII(server_header.c_str(),
-                                  kAutofillQueryServerNameStartInHeader,
-                                  false) != 0)
+            base::StartsWith(server_header.c_str(),
+                             kAutofillQueryServerNameStartInHeader,
+                             base::CompareCase::INSENSITIVE_ASCII) != 0)
           break;
         // Bad gateway was received from Autofill servers. Fall through to back
         // off.