[interpreter] Make it possible to optimize without parse.

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index c8966114bfef377a012dcc688fe40f7cbbd9c481..2d5655002067c71f7da121c49cf11338363d34e6 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -279,10 +279,13 @@ void CompilationInfo::LogDeoptCallPosition(int pc_offset, int inlining_id) {
 
 
 base::SmartArrayPointer<char> CompilationInfo::GetDebugName() const {
-  if (parse_info()) {
+  if (parse_info() && parse_info()->literal()) {
     AllowHandleDereference allow_deref;
     return parse_info()->literal()->debug_name()->ToCString();
   }
+  if (parse_info() && !parse_info()->shared_info().is_null()) {
+    return parse_info()->shared_info()->DebugName()->ToCString();
+  }
   const char* str = debug_name_ ? debug_name_ : "unknown";
   size_t len = strlen(str) + 1;
   base::SmartArrayPointer<char> name(new char[len]);