Add script streaming API

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index 215296d735cc5b8b9698cfc67d9dc0cfa3bd7208..35b494d2246bbbaa3bb7b56ff98a23556713f971 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -7,6 +7,7 @@
 #include "src/v8.h"
 
 #include "src/ast.h"
+#include "src/background-parser-thread.h"
 #include "src/base/platform/platform.h"
 #include "src/base/utils/random-number-generator.h"
 #include "src/bootstrapper.h"
@@ -1470,6 +1471,7 @@ Isolate::Isolate()
       function_entry_hook_(NULL),
       deferred_handles_head_(NULL),
       optimizing_compiler_thread_(NULL),
+      background_parser_thread_(NULL),
       sweeper_thread_(NULL),
       num_sweeper_threads_(0),
       stress_deopt_count_(0),
@@ -1558,6 +1560,12 @@ void Isolate::Deinit() {
       optimizing_compiler_thread_ = NULL;
     }
 
+    if (background_parser_thread_) {
+      background_parser_thread_->Stop();
+      delete background_parser_thread_;
+      background_parser_thread_ = NULL;
+    }
+
     for (int i = 0; i < num_sweeper_threads_; i++) {
       sweeper_thread_[i]->Stop();
       delete sweeper_thread_[i];
@@ -1918,6 +1926,9 @@ bool Isolate::Init(Deserializer* des) {
     }
   }
 
+  background_parser_thread_ = new BackgroundParserThread();
+  background_parser_thread_->Start();
+
   // If we are deserializing, read the state into the now-empty heap.
   if (!create_heap_objects) {
     des->Deserialize(this);