Revert "Revert "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..51cf72f5c492f7645c9998f812c2fa66ff54d586 100644
--- a/Source/bindings/dart/DartUtilities.cpp
+++ b/Source/bindings/dart/DartUtilities.cpp
@@ -30,6 +30,9 @@
 #include "config.h"
 #include "bindings/dart/DartUtilities.h"
 
+#include "DartBlob.h"
+#include "DartIDBKeyRange.h"
+#include "DartImageData.h"
 #include "DartMessagePort.h"
 #include "bindings/dart/DartDOMData.h"
 #include "bindings/dart/DartHandleProxy.h"
@@ -65,6 +68,7 @@ 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)
 {
@@ -345,17 +349,28 @@ bool DartUtilities::isDateTime(Dart_Handle handle)
 
 bool DartUtilities::isBlob(Dart_Handle handle)
 {
-    return objectIsType(handle, htmlLibraryName, "Blob");
+    return objectIsType(handle, DartDOMWrapper::dartClass<DartBlob>());
 }
 
 bool DartUtilities::isImageData(Dart_Handle handle)
 {
-    return objectIsType(handle, htmlLibraryName, "ImageData");
+    return objectIsType(handle, DartDOMWrapper::dartClass<DartImageData>());
 }
 
 bool DartUtilities::isIDBKeyRange(Dart_Handle handle)
 {
-    return objectIsType(handle, indexedDBLibraryName, "KeyRange");
+    return objectIsType(handle, DartDOMWrapper::dartClass<DartIDBKeyRange>());
+}
+
+bool DartUtilities::objectIsType(Dart_Handle handle, Dart_Handle cls)
+{
+    bool isType = false;
+    Dart_Handle result = Dart_ObjectIsType(handle, cls, &isType);
+    ASSERT(!Dart_IsError(result));
+    if (Dart_IsError(result))
+        return false;
+
+    return isType;
 }
 
 bool DartUtilities::objectIsType(Dart_Handle handle, const char* libraryName, const char* typeName)
@@ -367,13 +382,28 @@ bool DartUtilities::objectIsType(Dart_Handle handle, const char* libraryName, co
     Dart_Handle cls = Dart_GetClass(library, Dart_NewStringFromCString(typeName));
     ASSERT(!Dart_IsError(cls));
 
-    bool isType = false;
-    Dart_Handle result = Dart_ObjectIsType(handle, cls, &isType);
+    return objectIsType(handle, cls);
+}
+
+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;
 
-    return isType;
+    Dart_Handle exception = 0;
+    bool boolResult = dartToBool(result, exception);
+    if (exception)
+        return false;
+    return boolResult;
 }
 
 bool DartUtilities::isTypedData(Dart_Handle handle)