Update base::StartsWith calls to new form

chrome/browser/net/async_dns_field_trial.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 "chrome/browser/net/async_dns_field_trial.h"
 
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_util.h"
 #include "build/build_config.h"
@@ skipping 61 matching lines @@
 #else
   const bool kDefault = false;
 #endif
 
   // Configure the AsyncDns field trial as follows:
   // groups AsyncDnsA and AsyncDnsB: return true,
   // groups SystemDnsA and SystemDnsB: return false,
   // otherwise (trial absent): return default.
   std::string group_name = base::FieldTrialList::FindFullName("AsyncDns");
   if (!group_name.empty()) {
-    const bool enabled = base::StartsWithASCII(group_name, "AsyncDns",
-                                               false /* case_sensitive */);
+    const bool enabled = base::StartsWith(group_name, "AsyncDns",
+                                          base::CompareCase::INSENSITIVE_ASCII);
     HistogramPrefDefaultSource(FIELD_TRIAL, enabled);
     return enabled;
   }
   HistogramPrefDefaultSource(HARD_CODED_DEFAULT, kDefault);
   return kDefault;
 }
 
 void LogAsyncDnsPrefSource(const PrefService::Preference* pref) {
   CHECK(pref);
 
@@ skipping 10 matching lines @@
     HistogramPrefSource(EXTENSION_PREF, enabled);
   else if (pref->IsUserControlled())
     HistogramPrefSource(USER_PREF, enabled);
   else if (pref->IsDefaultValue())
     HistogramPrefSource(DEFAULT_PREF, enabled);
   else
     HistogramPrefSource(UNKNOWN_PREF, enabled);
 }
 
 }  // namespace chrome_browser_net