Debugger: clear shared function info list when recompiling for liveedit.

R=bmeurer@chromium.org
BUG=chromium:517594
LOG=N

Review URL: https://codereview.chromium.org/1270313003

Cr-Commit-Position: refs/heads/master@{#30111}

src/compiler.cc

@@ -1054,6 +1054,7 @@ void Compiler::CompileForLiveEdit(Handle<Script> script) {
   VMState<COMPILER> state(info.isolate());
 
   // Get rid of old list of shared function infos.
+  script->set_shared_function_infos(Smi::FromInt(0));
   info.MarkAsFirstCompile();
   info.parse_info()->set_global();
   if (!Parser::ParseStatic(info.parse_info())) return;