Dartium changes for custom element lifecycle events.

Source/bindings/dart/DartUtilities.cpp

Index: Source/bindings/dart/DartUtilities.cpp
diff --git a/Source/bindings/dart/DartUtilities.cpp b/Source/bindings/dart/DartUtilities.cpp
index 04eadb97724e6c11a5924d0486bf0671123335f9..b2586d4a078632dca3da59d148c1a076572b0d37 100644
--- a/Source/bindings/dart/DartUtilities.cpp
+++ b/Source/bindings/dart/DartUtilities.cpp
@@ -65,6 +65,7 @@ namespace WebCore {
 
 const char* DartUtilities::htmlLibraryName = "dart:html";
 const char* DartUtilities::indexedDBLibraryName = "dart:indexed_db";
+const char* DartUtilities::svgLibraryName = "dart:svg";
 
 static void stringFinalizer(void* peer)
 {
@@ -376,6 +377,28 @@ bool DartUtilities::objectIsType(Dart_Handle handle, const char* libraryName, co
     return isType;
 }
 
+bool DartUtilities::isTypeSubclassOf(Dart_Handle type, const char* libraryName, const char* typeName)
+{
+    Dart_Handle library = libraryForCurrentIsolate(libraryName);
+    ASSERT(!Dart_IsError(library));
+
+    Dart_Handle other = Dart_GetType(library, Dart_NewStringFromCString(typeName), 0, 0);
+    ASSERT(!Dart_IsError(other));
+
+    Dart_Handle args[2] = { type, other };
+    Dart_Handle result = DartUtilities::invokeUtilsMethod("isTypeSubclassOf", 2, args);
+    ASSERT(!Dart_IsError(result));
+    if (Dart_IsError(result))
+        return false;
+
+    Dart_Handle exception = 0;
+    bool boolResult = dartToBool(result, exception);
+    if (exception) {
+        return false;
+    }
+    return boolResult;
+}
+
 bool DartUtilities::isTypedData(Dart_Handle handle)
 {
     return Dart_GetTypeOfTypedData(handle) != Dart_TypedData_kInvalid || Dart_GetTypeOfExternalTypedData(handle) != Dart_TypedData_kInvalid;