[turbofan] Support initial step-in through debugger statement.

test/mjsunit/mjsunit.status

Index: test/mjsunit/mjsunit.status
diff --git a/test/mjsunit/mjsunit.status b/test/mjsunit/mjsunit.status
index 885f7e09639bf5b40dcc864c1aa6a1d09a46e489..193abffb5d97aed8e242165f3a6cb13d8ff62c6c 100644
--- a/test/mjsunit/mjsunit.status
+++ b/test/mjsunit/mjsunit.status
@@ -96,24 +96,12 @@
   'debug-evaluate-locals': [PASS, NO_VARIANTS],
   'debug-liveedit-check-stack': [PASS, NO_VARIANTS],  # only in no-snap mode.
   'debug-liveedit-double-call': [PASS, NO_VARIANTS],
-  'debug-step-stub-callfunction': [PASS, NO_VARIANTS],
   'debug-set-variable-value': [PASS, NO_VARIANTS],
-  'debug-stepin-accessor': [PASS, NO_VARIANTS],
-  'debug-stepin-builtin': [PASS, NO_VARIANTS],
-  'debug-stepin-constructor': [PASS, NO_VARIANTS],
-  'debug-stepin-function-call': [PASS, NO_VARIANTS],
-  'debug-stepin-positions': [PASS, NO_VARIANTS],
-  'debug-stepin-property-function-call': [PASS, NO_VARIANTS],
-  'debug-stepnext-do-while': [PASS, NO_VARIANTS],
   'debug-stepout-scope-part1': [PASS, NO_VARIANTS],
   'debug-stepout-scope-part2': [PASS, NO_VARIANTS],
   'debug-stepout-scope-part3': [PASS, NO_VARIANTS],
-  'debug-scripts-request': [PASS, NO_VARIANTS],
-  'es6/debug-stepin-microtasks': [PASS, NO_VARIANTS],
-  'es6/debug-stepnext-for': [PASS, NO_VARIANTS],
   'es6/debug-evaluate-blockscopes': [PASS, NO_VARIANTS],
   'regress/regress-crbug-259300': [PASS, NO_VARIANTS],
-  'es6/regress/regress-468661': [PASS, NO_VARIANTS],
 
   ##############################################################################
   # Too slow in debug mode with --stress-opt mode.