Update //base to chromium 9659b08ea5a34f889dc4166217f438095ddc10d2

tonic/dart_library_provider_network.cc

Index: tonic/dart_library_provider_network.cc
diff --git a/tonic/dart_library_provider_network.cc b/tonic/dart_library_provider_network.cc
index 890ca536f9c45cb382f40e526e9e97d9727f84cc..635d07ea5f43fe2bc084caf0d7ffa39fe21c0a5c 100644
--- a/tonic/dart_library_provider_network.cc
+++ b/tonic/dart_library_provider_network.cc
@@ -81,11 +81,12 @@ void DartLibraryProviderNetwork::GetLibraryAsStream(
 Dart_Handle DartLibraryProviderNetwork::CanonicalizeURL(Dart_Handle library,
                                                         Dart_Handle url) {
   std::string string = StdStringFromDart(url);
-  if (StartsWithASCII(string, "dart:", true))
+  if (base::StartsWithASCII(string, "dart:", true))
     return url;
   // TODO(abarth): The package root should be configurable.
-  if (StartsWithASCII(string, "package:", true))
-    ReplaceFirstSubstringAfterOffset(&string, 0, "package:", "/packages/");
+  if (base::StartsWithASCII(string, "package:", true))
+    base::ReplaceFirstSubstringAfterOffset(&string, 0, "package:",
+                                           "/packages/");
   GURL library_url(StdStringFromDart(Dart_LibraryUrl(library)));
   GURL resolved_url = library_url.Resolve(string);
   return StdStringToDart(resolved_url.spec());