Revert of Implement the script parts of custom element upgrade steps.

third_party/WebKit/Source/bindings/core/v8/ScriptCustomElementDefinition.cpp

Index: third_party/WebKit/Source/bindings/core/v8/ScriptCustomElementDefinition.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/ScriptCustomElementDefinition.cpp b/third_party/WebKit/Source/bindings/core/v8/ScriptCustomElementDefinition.cpp
index b382f5e9821d045d33e7d2ce6790c20bfbead92e..8e60471ce2a3df6acc8fdd65b304c94e65bf49d3 100644
--- a/third_party/WebKit/Source/bindings/core/v8/ScriptCustomElementDefinition.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/ScriptCustomElementDefinition.cpp
@@ -6,14 +6,8 @@
 
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/V8Binding.h"
-#include "bindings/core/v8/V8BindingMacros.h"
 #include "bindings/core/v8/V8CustomElementsRegistry.h"
-#include "bindings/core/v8/V8Element.h"
 #include "bindings/core/v8/V8HiddenValue.h"
-#include "bindings/core/v8/V8ScriptRunner.h"
-#include "bindings/core/v8/V8ThrowException.h"
-#include "core/dom/ExceptionCode.h"
-#include "v8.h"
 #include "wtf/Allocator.h"
 
 namespace blink {
@@ -126,45 +120,6 @@
     m_prototype.setPhantom();
 }
 
-// https://html.spec.whatwg.org/multipage/scripting.html#upgrades
-bool ScriptCustomElementDefinition::runConstructor(Element* element)
-{
-    if (!m_scriptState->contextIsValid())
-        return false;
-    ScriptState::Scope scope(m_scriptState.get());
-    v8::Isolate* isolate = m_scriptState->isolate();
-
-    // Step 5 says to rethrow the exception; but there is no one to
-    // catch it. The side effect is to report the error.
-    v8::TryCatch tryCatch(isolate);
-    tryCatch.SetVerbose(true);
-
-    ExecutionContext* executionContext = m_scriptState->getExecutionContext();
-    v8::Local<v8::Value> result;
-    if (!v8Call(V8ScriptRunner::callAsConstructor(
-        isolate,
-        constructor(),
-        executionContext,
-        0,
-        nullptr),
-        result))
-        return false;
-
-    if (V8Element::toImplWithTypeCheck(isolate, result) != element) {
-        V8ThrowException::throwException(
-            V8ThrowException::createDOMException(
-                m_scriptState->isolate(),
-                InvalidStateError,
-                "custom element constructors must call super() first and must "
-                "not return a different object",
-                constructor()),
-            m_scriptState->isolate());
-        return false;
-    }
-
-    return true;
-}
-
 v8::Local<v8::Object> ScriptCustomElementDefinition::constructor() const
 {
     DCHECK(!m_constructor.isEmpty());