Remove explicit namespace in FunctionCallbackArguments

This commit removes the explicit namespace in FunctionCallbackArguments
constructor. They are not needed and this change seems to be consistent
with other CustomArguments classes like PropertyCallbackArguments.

Change-Id: If18371fbb2e6a7161ea4a1633f4219f3498cdc8c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2141740Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67148}

src/api/api-arguments.h

@@ -160,11 +160,9 @@ class FunctionCallbackArguments
   static const int kIsolateIndex = T::kIsolateIndex;
   static const int kNewTargetIndex = T::kNewTargetIndex;
 
-  FunctionCallbackArguments(internal::Isolate* isolate, internal::Object data,
-                            internal::HeapObject callee,
-                            internal::Object holder,
-                            internal::HeapObject new_target,
-                            internal::Address* argv, int argc);
+  FunctionCallbackArguments(Isolate* isolate, Object data, HeapObject callee,
+                            Object holder, HeapObject new_target, Address* argv,
+                            int argc);
 
   /*
    * The following Call function wraps the calling of all callbacks to handle