Revert "Move dart:web to pkg:htmlescape."

runtime/bin/dartutils.cc

Index: runtime/bin/dartutils.cc
diff --git a/runtime/bin/dartutils.cc b/runtime/bin/dartutils.cc
index 57f70069f0bb40e6bb89db0e35f3d7d3f66f30a8..8223b9f633ff8905a2bb6bee8dc1dc233397b42f 100644
--- a/runtime/bin/dartutils.cc
+++ b/runtime/bin/dartutils.cc
@@ -23,6 +23,7 @@ const char* DartUtils::kJsonLibURL = "dart:json";
 const char* DartUtils::kUriLibURL = "dart:uri";
 const char* DartUtils::kUtfLibURL = "dart:utf";
 const char* DartUtils::kIsolateLibURL = "dart:isolate";
+const char* DartUtils::kWebLibURL = "dart:web";
 
 
 const char* DartUtils::kIdFieldName = "_id";
@@ -165,6 +166,11 @@ bool DartUtils::IsDartUtfLibURL(const char* url_name) {
 }
 
 
+bool DartUtils::IsDartWebLibURL(const char* url_name) {
+  return (strcmp(url_name, kWebLibURL) == 0);
+}
+
+
 Dart_Handle DartUtils::CanonicalizeURL(CommandLineOptions* url_mapping,
                                        Dart_Handle library,
                                        const char* url_str) {
@@ -300,6 +306,8 @@ Dart_Handle DartUtils::LibraryTagHandler(Dart_LibraryTag tag,
       id = Builtin::kUriLibrary;
     } else if (DartUtils::IsDartUtfLibURL(url_string)) {
       id = Builtin::kUtfLibrary;
+    } else if (DartUtils::IsDartWebLibURL(url_string)) {
+      id = Builtin::kWebLibrary;
     } else {
       return Dart_Error("Do not know how to load '%s'", url_string);
     }