Revert of Correctly compute line numbers in functions from the function constructor.

src/generator.js

Index: src/generator.js
diff --git a/src/generator.js b/src/generator.js
index 9ab7dcb9aab9b78baea82ca749ce129a5350be75..fa6e9764ad1865b6c7e23dc7054ec4cc11ccf431 100644
--- a/src/generator.js
+++ b/src/generator.js
@@ -74,7 +74,13 @@ function GeneratorFunctionPrototypeConstructor(x) {
 }
 
 function GeneratorFunctionConstructor(arg1) {  // length == 1
-  return NewFunctionFromString(arguments, 'function*');
+  var source = NewFunctionString(arguments, 'function*');
+  var global_proxy = %GlobalProxy(global);
+  // Compile the string in the constructor and not a helper so that errors
+  // appear to come from here.
+  var f = %_CallFunction(global_proxy, %CompileString(source, true));
+  %FunctionMarkNameShouldPrintAsAnonymous(f);
+  return f;
 }