Debugger: prepare code for debugging on a per-function basis.

src/background-parsing-task.cc

Index: src/background-parsing-task.cc
diff --git a/src/background-parsing-task.cc b/src/background-parsing-task.cc
index d7df9b4717395aa04799cfdcbbd7ff9be430848d..993cbe06677e56698a2bc84f25650d9d5380c108 100644
--- a/src/background-parsing-task.cc
+++ b/src/background-parsing-task.cc
@@ -31,14 +31,11 @@ BackgroundParsingTask::BackgroundParsingTask(
   info->set_global();
   info->set_unicode_cache(&source_->unicode_cache);
 
-  bool disable_lazy = Compiler::DebuggerWantsEagerCompilation(isolate);
-  if (disable_lazy && options == ScriptCompiler::kProduceParserCache) {
-    // Producing cached data while parsing eagerly is not supported.
-    options = ScriptCompiler::kNoCompileOptions;
-  }
-
   info->set_compile_options(options);
-  info->set_allow_lazy_parsing(!disable_lazy);
+
+  // The background parsing task is not used for eval, where we may compile for
+  // debugging. Without compiling inner functions eagerly, we can parse lazily.
+  info->set_allow_lazy_parsing(true);
 }