Implement Custom Element's class side inheritance

Source/bindings/core/v8/CustomElementConstructorBuilder.cpp

Index: Source/bindings/core/v8/CustomElementConstructorBuilder.cpp
diff --git a/Source/bindings/core/v8/CustomElementConstructorBuilder.cpp b/Source/bindings/core/v8/CustomElementConstructorBuilder.cpp
index 5c57589d4347430d49734e7ef2356cb345bae8ad..9b96d81dd1a9bb40caada754fb32dd1a3f80a339 100644
--- a/Source/bindings/core/v8/CustomElementConstructorBuilder.cpp
+++ b/Source/bindings/core/v8/CustomElementConstructorBuilder.cpp
@@ -186,6 +186,8 @@ bool CustomElementConstructorBuilder::createConstructor(Document* document, Cust
     V8HiddenValue::setHiddenValue(isolate, m_constructor, V8HiddenValue::customElementType(isolate), v8Type);
 
     v8::Local<v8::String> prototypeKey = v8String(isolate, "prototype");
+    v8::Local<v8::String> constructorKey = v8String(isolate, "constructor");

[dominicc (has gone to gerrit), 2015/04/09 06:37:57]

Move this down near to where it is used.

[deepak.s, 2015/04/15 06:44:53]

Done.

+
     if (!v8CallBoolean(m_constructor->HasOwnProperty(context, prototypeKey)))
         return false;
     // This sets the property *value*; calling Set is safe because
@@ -198,9 +200,12 @@ bool CustomElementConstructorBuilder::createConstructor(Document* document, Cust
     // property.
     if (!v8CallBoolean(m_constructor->ForceSet(context, prototypeKey, m_prototype, v8::PropertyAttribute(v8::ReadOnly | v8::DontEnum | v8::DontDelete))))
         return false;
+    // The generated constructor should inherit from constructor.
+    if (!v8CallBoolean(m_constructor->SetPrototype(context, m_prototype->Get(constructorKey))))

[dominicc (has gone to gerrit), 2015/04/09 06:37:57]

FYI It looks like the bool SetPrototype is deprecated, but this is fine this way
because it's consistent with the surrounding stuff. We can update it later in a
clean-up pass.

https://code.google.com/p/chromium/codesearch#chromium/src/v8/include/v8.h&q=...

+        return false;
 
     V8HiddenValue::setHiddenValue(isolate, m_prototype, V8HiddenValue::customElementIsInterfacePrototypeObject(isolate), v8::True(isolate));
-    if (!v8CallBoolean(m_prototype->ForceSet(context, v8String(isolate, "constructor"), m_constructor, v8::DontEnum)))
+    if (!v8CallBoolean(m_prototype->ForceSet(context, constructorKey, m_constructor, v8::DontEnum)))
         return false;
 
     return true;