base::StartsWithASCII() -> base::StartsWith().

dart_library_provider_files.cc

 // Copyright 2015 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 "tonic/dart_library_provider_files.h"
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/run_loop.h"
 #include "base/strings/string_util.h"
@@ skipping 44 matching lines @@
   callback.Run(pipe.consumer_handle.Pass());
 
   base::FilePath source(name);
   scoped_refptr<base::SingleThreadTaskRunner> runner =
       base::MessageLoop::current()->task_runner();
   mojo::common::CopyFromFile(source, pipe.producer_handle.Pass(), 0,
                              runner.get(), base::Bind(&CopyComplete, source));
 }
 
 std::string DartLibraryProviderFiles::CanonicalizePackageURL(std::string url) {
-  DCHECK(base::StartsWithASCII(url, "package:", true));
+  DCHECK(base::StartsWith(url, "package:", base::CompareCase::SENSITIVE));
   base::ReplaceFirstSubstringAfterOffset(&url, 0, "package:", "");
   return package_root_.Append(url).AsUTF8Unsafe();
 }
 
 Dart_Handle DartLibraryProviderFiles::CanonicalizeURL(Dart_Handle library,
                                                       Dart_Handle url) {
   std::string string = StdStringFromDart(url);
-  if (base::StartsWithASCII(string, "dart:", true))
+  if (base::StartsWith(string, "dart:", base::CompareCase::SENSITIVE))
     return url;
-  if (base::StartsWithASCII(string, "package:", true))
+  if (base::StartsWith(string, "package:", base::CompareCase::SENSITIVE))
     return StdStringToDart(CanonicalizePackageURL(string));
   base::FilePath base_path(StdStringFromDart(Dart_LibraryUrl(library)));
   base::FilePath resolved_path = base_path.DirName().Append(string);
   base::FilePath normalized_path = SimplifyPath(resolved_path);
   return StdStringToDart(normalized_path.AsUTF8Unsafe());
 }
 
 }  // namespace tonic