Implement new Function.prototype.toString and fix CreateDynamicFunction parsing

src/compiler.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_H_
 #define V8_COMPILER_H_
 
 #include <memory>
 
 #include "src/allocation.h"
@@ skipping 80 matching lines @@
   // is left to the discretion of the compiler.
   //
   // Please note this interface returns shared function infos.  This means you
   // need to call Factory::NewFunctionFromSharedFunctionInfo before you have a
   // real function with a context.
 
   // Create a (bound) function for a String source within a context for eval.
   MUST_USE_RESULT static MaybeHandle<JSFunction> GetFunctionFromEval(
       Handle<String> source, Handle<SharedFunctionInfo> outer_info,
       Handle<Context> context, LanguageMode language_mode,
-      ParseRestriction restriction, int eval_scope_position, int eval_position,
-      int line_offset = 0, int column_offset = 0,
-      Handle<Object> script_name = Handle<Object>(),
+      ParseRestriction restriction, int parameters_end_pos,
+      int eval_scope_position, int eval_position, int line_offset = 0,
+      int column_offset = 0, Handle<Object> script_name = Handle<Object>(),
       ScriptOriginOptions options = ScriptOriginOptions());
 
   // Create a (bound) function for a String source within a context for eval.
   MUST_USE_RESULT static MaybeHandle<JSFunction> GetFunctionFromString(
       Handle<Context> context, Handle<String> source,
-      ParseRestriction restriction);
+      ParseRestriction restriction, int parameters_end_pos);
 
   // Create a shared function info object for a String source within a context.
   static Handle<SharedFunctionInfo> GetSharedFunctionInfoForScript(
       Handle<String> source, Handle<Object> script_name, int line_offset,
       int column_offset, ScriptOriginOptions resource_options,
       Handle<Object> source_map_url, Handle<Context> context,
       v8::Extension* extension, ScriptData** cached_data,
       ScriptCompiler::CompileOptions compile_options,
       NativesFlag is_natives_code);
 
@@ skipping 113 matching lines @@
       state_ = State::kFailed;
     }
     return status;
   }
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_H_