[debugger] Refactor LiveEdit function info collection

src/compiler.h

Index: src/compiler.h
diff --git a/src/compiler.h b/src/compiler.h
index 398409ad1a3a8e401c302a4625e16c24cc494bd0..64bc88d4981d510be7d5039ede91714c6c58e96f 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -48,7 +48,7 @@ class Compiler : public AllStatic {
   static bool CompileOptimized(Handle<JSFunction> function, ConcurrencyMode);
   static bool CompileDebugCode(Handle<JSFunction> function);
   static bool CompileDebugCode(Handle<SharedFunctionInfo> shared);
-  static bool CompileForLiveEdit(Handle<Script> script);
+  static MaybeHandle<JSArray> CompileForLiveEdit(Handle<Script> script);
 
   // Generate and install code from previously queued compilation job.
   static void FinalizeCompilationJob(CompilationJob* job);