Refactor Parser to make it usable on a background thread.

test/cctest/test-parsing.cc

Index: test/cctest/test-parsing.cc
diff --git a/test/cctest/test-parsing.cc b/test/cctest/test-parsing.cc
index 8a76f52daf16b7fc08b6bb1fa310480971d63ea2..e874edd94fbf6ef43902dfc3fea3656755100f53 100644
--- a/test/cctest/test-parsing.cc
+++ b/test/cctest/test-parsing.cc
@@ -1128,7 +1128,8 @@ TEST(ScopePositions) {
     CHECK_EQ(source->length(), kProgramSize);
     i::Handle<i::Script> script = factory->NewScript(source);
     i::CompilationInfoWithZone info(script);
-    i::Parser parser(&info);
+    i::Parser parser(&info, isolate->stack_guard()->real_climit(),
+                     isolate->heap()->HashSeed(), isolate->unicode_cache());
     parser.set_allow_lazy(true);
     parser.set_allow_harmony_scoping(true);
     parser.set_allow_arrow_functions(true);
@@ -1263,7 +1264,8 @@ void TestParserSyncWithFlags(i::Handle<i::String> source,
   {
     i::Handle<i::Script> script = factory->NewScript(source);
     i::CompilationInfoWithZone info(script);
-    i::Parser parser(&info);
+    i::Parser parser(&info, isolate->stack_guard()->real_climit(),
+                     isolate->heap()->HashSeed(), isolate->unicode_cache());
     SetParserFlags(&parser, flags);
     info.MarkAsGlobal();
     parser.Parse();
@@ -3125,7 +3127,9 @@ TEST(InnerAssignment) {
 
           i::Handle<i::Script> script = factory->NewScript(source);
           i::CompilationInfoWithZone info(script);
-          i::Parser parser(&info);
+          i::Parser parser(&info, isolate->stack_guard()->real_climit(),
+                           isolate->heap()->HashSeed(),
+                           isolate->unicode_cache());
           parser.set_allow_harmony_scoping(true);
           CHECK(parser.Parse());
           CHECK(i::Rewriter::Rewrite(&info));