Extract ParseInfo from CompilationInfo.

src/background-parsing-task.h

Index: src/background-parsing-task.h
diff --git a/src/background-parsing-task.h b/src/background-parsing-task.h
index 19c93a833a2cefe5e82af904c25086383ebac038..76988755a6371e4400ae867cec09dbc458c1c916 100644
--- a/src/background-parsing-task.h
+++ b/src/background-parsing-task.h
@@ -14,8 +14,6 @@
 namespace v8 {
 namespace internal {
 
-class Parser;
-
 // Internal representation of v8::ScriptCompiler::StreamedSource. Contains all
 // data which needs to be transmitted between threads for background parsing,
 // finalizing it on the main thread, and compiling on the main thread.
@@ -36,7 +34,8 @@ struct StreamedSource {
   // between parsing and compilation. These need to be initialized before the
   // compilation starts.
   UnicodeCache unicode_cache;
-  SmartPointer<CompilationInfo> info;
+  SmartPointer<ParseInfo> info;
+  SmartPointer<Zone> zone;
   uint32_t hash_seed;
   bool allow_lazy;
   SmartPointer<Parser> parser;