Debugger: correctly recompile toplevel eval functions for debugging.

src/compiler.h

Index: src/compiler.h
diff --git a/src/compiler.h b/src/compiler.h
index 7bedcad25b2629fc2df46a66e48fea164e12c13d..df81a4f5d27790dbdef89c20e013c29c08ceaf0a 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -624,10 +624,8 @@ class Compiler : public AllStatic {
   MUST_USE_RESULT static MaybeHandle<Code> GetLazyCode(
       Handle<JSFunction> function);
 
-  MUST_USE_RESULT static MaybeHandle<Code> GetDebugCode(
-      Handle<JSFunction> function);
-  MUST_USE_RESULT static MaybeHandle<Code> GetDebugCode(
-      Handle<SharedFunctionInfo> shared);
+  static bool CompileDebugCode(Handle<JSFunction> function);
+  static bool CompileDebugCode(Handle<SharedFunctionInfo> shared);
 
   // Parser::Parse, then Compiler::Analyze.
   static bool ParseAndAnalyze(ParseInfo* info);