Revert 157959 "Introduce a new reference graph to SVG*TearOffs."

Source/bindings/scripts/code_generator_v8.pm

 # Copyright (C) 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
 # Copyright (C) 2006 Anders Carlsson <andersca@mac.com>
 # Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
 # Copyright (C) 2006 Alexey Proskuryakov <ap@webkit.org>
 # Copyright (C) 2006 Apple Computer, Inc.
 # Copyright (C) 2007, 2008, 2009, 2012 Google Inc.
 # Copyright (C) 2009 Cameron McCormack <cam@mcc.id.au>
 # Copyright (C) Research In Motion Limited 2010. All rights reserved.
 # Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
 # Copyright (C) 2012 Ericsson AB. All rights reserved.
@@ skipping 801 matching lines @@
 
     $header{nameSpaceWebCore}->add(<<END);
 
 template<>
 class WrapperTypeTraits<${nativeType} > {
 public:
     static WrapperTypeInfo* info() { return &${v8ClassName}::info; }
 };
 END
 
-    my $customWrap = $interface->extendedAttributes->{"CustomToV8"} || SVGTypeNeedsToHoldContextElement($interface->name);
+    my $customWrap = $interface->extendedAttributes->{"CustomToV8"};
     if ($noToV8) {
         die "Can't suppress toV8 for subclass\n" if $interface->parent;
     } elsif ($noWrap) {
         die "Must have custom toV8\n" if !$customWrap;
         $header{nameSpaceWebCore}->add(<<END);
 class ${nativeType};
 v8::Handle<v8::Value> toV8(${nativeType}*, v8::Handle<v8::Object> creationContext, v8::Isolate*);
 
 template<class CallbackInfo>
 inline void v8SetReturnValue(const CallbackInfo& callbackInfo, ${nativeType}* impl, v8::Handle<v8::Object> creationContext)
@@ skipping 3222 matching lines @@
     ASSERT(impl);
     v8::Handle<v8::Object> wrapper = ${v8ClassName}::createWrapper(impl, creationContext, isolate);
     if (!wrapper.IsEmpty())
         wrapper->SetIndexedPropertiesToExternalArrayData(impl->baseAddress(), $arrayType, impl->length());
     return wrapper;
 }
 
 END
     }
 
-    # Add strong reference from TearOff to SVGElement, so that SVGElement would never get GC-ed while the TearOff is alive. We do this in V8-side to avoid circular reference on Blink side.
-    if (SVGTypeNeedsToHoldContextElement($interface->name)) {
-        # below include needed for SVGPathSegListPropertyTearOff
-        AddToImplIncludes("V8SVGPathElement.h");
-        $implementation{nameSpaceWebCore}->add(<<END);
-v8::Handle<v8::Object> wrap($nativeType* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
-{
-    ASSERT(impl);
-    ASSERT(!DOMDataStore::containsWrapper<${v8ClassName}>(impl, isolate));
-    v8::Handle<v8::Object> wrapper = ${v8ClassName}::createWrapper(impl, creationContext, isolate);
-    if (impl->contextElement())
-        V8HiddenPropertyName::setNamedHiddenReference(wrapper, "contextElement", toV8(impl->contextElement(), creationContext, isolate));
-    return wrapper;
-}
-
-END
-    }
-
     my @enabledPerContextFunctions;
     my @normalFunctions;
     my $needsDomainSafeFunctionSetter = 0;
     # Generate methods for functions.
     foreach my $function (@{$interface->functions}) {
         next if $function->name eq "";
         GenerateFunction($function, $interface, "");
         if ($function->extendedAttributes->{"PerWorldBindings"}) {
             GenerateFunction($function, $interface, "ForMainWorld");
         }
@@ skipping 1744 matching lines @@
     return $svgTypeNeedingTearOff;
 }
 
 sub IsSVGAnimatedType
 {
     my $type = shift;
 
     return $type =~ /^SVGAnimated/;
 }
 
-sub SVGTypeNeedsToHoldContextElement
-{
-    my $type = shift;
-
-    return IsSVGTypeNeedingTearOff($type) || IsSVGAnimatedType($type);
-}
-
 sub GetSequenceType
 {
     my $type = shift;
 
     return $1 if $type =~ /^sequence<([\w\d_\s]+)>.*/;
     return "";
 }
 
 sub GetArrayType
 {
@@ skipping 253 matching lines @@
         if ($currentInterface->extendedAttributes->{$extendedAttribute}) {
             $found = 1;
         }
         return 1 if $found;
     }, 0);
 
     return $found;
 }
 
 1;