Avoid GC when printing shared function info.

src/objects-printer.cc

Index: src/objects-printer.cc
diff --git a/src/objects-printer.cc b/src/objects-printer.cc
index c35ed5e237cc1ab563cc9a329fcc0dea07c48f28..9bd7a75fda3da289a822161bbabb4908234b7996 100644
--- a/src/objects-printer.cc
+++ b/src/objects-printer.cc
@@ -794,7 +794,14 @@ void SharedFunctionInfo::SharedFunctionInfoPrint(FILE* out) {
   code()->ShortPrint(out);
   if (HasSourceCode()) {
     PrintF(out, "\n - source code = ");
-    GetSourceCode()->ShortPrint(out);
+    String* source = String::cast(Script::cast(script())->source());
+    int start = start_position();
+    int length = end_position() - start;
+    SmartArrayPointer<char> source_string =
+        source->ToCString(DISALLOW_NULLS,
+                          FAST_STRING_TRAVERSAL,
+                          start, length, NULL);
+    PrintF(out, "%s", *source_string);
   }
   // Script files are often large, hard to read.
   // PrintF(out, "\n - script =");