[Bindings] Remove redundant ToObject invocation in dictionary toImpl.

third_party/WebKit/Source/bindings/templates/dictionary_v8.cpp.tmpl

Index: third_party/WebKit/Source/bindings/templates/dictionary_v8.cpp.tmpl
diff --git a/third_party/WebKit/Source/bindings/templates/dictionary_v8.cpp.tmpl b/third_party/WebKit/Source/bindings/templates/dictionary_v8.cpp.tmpl
index 6146238c740ee40050d1a8a9b76532efc58ab139..43c644ae1f32c309dbd3d7e6f2924580503b8df0 100644
--- a/third_party/WebKit/Source/bindings/templates/dictionary_v8.cpp.tmpl
+++ b/third_party/WebKit/Source/bindings/templates/dictionary_v8.cpp.tmpl
@@ -37,11 +37,7 @@ void {{v8_class}}::toImpl(v8::Isolate* isolate, v8::Local<v8::Value> v8Value, {{
   {# Declare local variables only when the dictionary has members to avoid unused variable warnings. #}
   {% if members %}
   v8::TryCatch block(isolate);
-  v8::Local<v8::Object> v8Object;
-  if (!v8Call(v8Value->ToObject(isolate->GetCurrentContext()), v8Object, block)) {
-    exceptionState.rethrowV8Exception(block.Exception());
-    return;
-  }
+  v8::Local<v8::Object> v8Object = v8Value.As<v8::Object>();

[Yuki, 2017/03/16 07:10:43]

nit: Could you move this cast up to just after line 29 (just after we checked
v8Value->IsObject())?

   {% endif %}
   {% for member in members %}
   {% filter runtime_enabled(member.runtime_enabled_feature_name) %}