bindings: Moves toV8 and v8SetReturnValue out to ToV8.h and V8Binding.h.

Source/bindings/templates/interface.h

 {% include 'copyright_block.txt' %}
 #ifndef {{v8_class}}_h
 #define {{v8_class}}_h
 
 {% filter conditional(conditional_string) %}
 {% for filename in header_includes %}
 #include "{{filename}}"
 {% endfor %}
 
 namespace blink {
@@ skipping 157 matching lines @@
     {{exported}}static void register{{method.name | blink_capitalize}}MethodForPartialInterface(void (*)(const v8::FunctionCallbackInfo<v8::Value>&));
     {% endfor %}
     {% endif %}
     {% if has_partial_interface %}
 
 private:
     static InstallTemplateFunction install{{v8_class}}TemplateFunction;
     {% endif %}
 };
 
-{% if has_custom_to_v8 %}
-template<typename CallbackInfo>
-inline void v8SetReturnValue(const CallbackInfo& callbackInfo, {{cpp_class}}* impl)
-{
-    v8SetReturnValue(callbackInfo, toV8(impl, callbackInfo.Holder(), callbackInfo.GetIsolate()));
-}
-
-template<typename CallbackInfo>
-inline void v8SetReturnValueForMainWorld(const CallbackInfo& callbackInfo, {{cpp_class}}* impl)
-{
-     v8SetReturnValue(callbackInfo, toV8(impl, callbackInfo.Holder(), callbackInfo.GetIsolate()));
-}
-
-template<typename CallbackInfo>
-inline void v8SetReturnValueFast(const CallbackInfo& callbackInfo, {{cpp_class}}* impl, const ScriptWrappable*)
-{
-     v8SetReturnValue(callbackInfo, toV8(impl, callbackInfo.Holder(), callbackInfo.GetIsolate()));
-}
-
-{% endif %}{# has_custom_to_v8 #}
 {% if has_event_constructor %}
 {{exported}}bool initialize{{cpp_class}}({{cpp_class}}Init&, const Dictionary&, ExceptionState&, const v8::FunctionCallbackInfo<v8::Value>& info);
 
 {% endif %}
 template <>
 struct V8TypeOf<{{cpp_class}}> {
     typedef {{v8_class}} Type;
 };
 
 } // namespace blink
 {% endfilter %}
 
 #endif // {{v8_class}}_h