Make the crypto library an official dart:crypto library.

runtime/bin/dartutils.cc

Index: runtime/bin/dartutils.cc
diff --git a/runtime/bin/dartutils.cc b/runtime/bin/dartutils.cc
index 9dd082dc26110927ca41e0e06bf9a549c8a673dc..afaa94dc781c5288cbcb35fe0af15807254b8f53 100644
--- a/runtime/bin/dartutils.cc
+++ b/runtime/bin/dartutils.cc
@@ -14,6 +14,7 @@ const char* DartUtils::kDartExtensionScheme = "dart-ext:";
 const char* DartUtils::kBuiltinLibURL = "dart:builtin";
 const char* DartUtils::kCoreLibURL = "dart:core";
 const char* DartUtils::kCoreImplLibURL = "dart:coreimpl";
+const char* DartUtils::kCryptoLibURL = "dart:crypto";
 const char* DartUtils::kIOLibURL = "dart:io";
 const char* DartUtils::kJsonLibURL = "dart:json";
 const char* DartUtils::kUriLibURL = "dart:uri";
@@ -114,6 +115,11 @@ bool DartUtils::IsDartExtensionSchemeURL(const char* url_name) {
 }
 
 
+bool DartUtils::IsDartCryptoLibURL(const char* url_name) {
+  return (strcmp(url_name, kCryptoLibURL) == 0);
+}
+
+
 bool DartUtils::IsDartIOLibURL(const char* url_name) {
   return (strcmp(url_name, kIOLibURL) == 0);
 }