Keep a persistent handle for the bindings classes to avoid repeated lookups that involve performing…

Source/bindings/dart/DartDOMWrapper.h

Index: Source/bindings/dart/DartDOMWrapper.h
diff --git a/Source/bindings/dart/DartDOMWrapper.h b/Source/bindings/dart/DartDOMWrapper.h
index aea7c6e8c97f775f658f8ef5d9d3d728629e1fc9..d5da2839ba63cd905ef397cdf3a5b27b368d2d8f 100644
--- a/Source/bindings/dart/DartDOMWrapper.h
+++ b/Source/bindings/dart/DartDOMWrapper.h
@@ -51,6 +51,11 @@ struct DartDOMWrapperTraits;
 
 class DartDOMWrapper {
 public:
+    enum {
+        DOMStringMapBindingCid = 0,
+        NumCustomBindingCids
+    };
+
     template <class WebKitClass>
     static Dart_Handle newWrapper(const char* className, const char* libraryName, WebKitClass* domObject)
     {
@@ -176,10 +181,25 @@ public:
         return unwrapDartWrapper<BindingsClass>(wrapper, exception);
     }
 
+    static intptr_t nextClassIndex;

[siva, 2013/09/10 00:18:50]

Not used anymore right, could be deleted.

[rmacnak, 2013/09/10 20:09:51]

Removed.

+
     template <class BindingsClass>
     static bool instanceOf(Dart_Handle wrapper)
     {
-        return instanceOf(BindingsClass::dartImplementationClassName, BindingsClass::dartImplementationLibraryName, wrapper);
+        Dart_Handle type = dartClass<BindingsClass>();
+
+        bool isInstanceOf = false;
+        Dart_Handle result = Dart_ObjectIsType(wrapper, type, &isInstanceOf);
+        ASSERT(!Dart_IsError(result));
+        if (Dart_IsError(result))
+            return false;

[siva, 2013/09/10 00:18:50]

Seems to assert and check, I think the ASSERT is not needed.

[rmacnak, 2013/09/10 20:09:51]

Removed.

+        return isInstanceOf;
+    }
+
+    template <class BindingsClass>
+    static Dart_Handle dartClass()

[siva, 2013/09/10 00:18:50]

This can also be private right.

[rmacnak, 2013/09/10 20:09:51]

Hidden.

+    {
+        return dartClass(BindingsClass::dartImplementationClassName, BindingsClass::dartImplementationLibraryName, BindingsClass::kBindingCid);
     }
 
     template <class WebKitClass>
@@ -221,8 +241,8 @@ private:
     };
 
     static Dart_Handle instantiateWrapper(const char* className, const char* libraryName);
-    static bool instanceOf(const char* dartImplementationClassName,
-            const char* dartImplementationLibraryName, Dart_Handle wrapper);
+    static Dart_Handle dartClass(const char* dartImplementationClassName,
+        const char* dartImplementationLibraryName, intptr_t classIndex);
 
     static void writeNativePointer(Dart_Handle wrapper, int index, void* pointer)
     {