Initial steps into streaming the kernel flowgraph

runtime/vm/kernel.h

Index: runtime/vm/kernel.h
diff --git a/runtime/vm/kernel.h b/runtime/vm/kernel.h
index e379105142ad173531552f2413917d3e6cbd4999..43c1123c30d2b5ffbcb132252f99f9db4bb2015d 100644
--- a/runtime/vm/kernel.h
+++ b/runtime/vm/kernel.h
@@ -507,8 +507,11 @@ class Library : public LinkedNode {
     return true;
   }
 
+  const uint8_t* kernel_data() { return kernel_data_; }
+  intptr_t kernel_data_size() { return kernel_data_size_; }
+
  private:
-  Library() : name_(NULL) {}
+  Library() : name_(NULL), kernel_data_(NULL), kernel_data_size_(-1) {}
 
   template <typename T>
   friend class List;
@@ -519,6 +522,8 @@ class Library : public LinkedNode {
   List<Class> classes_;
   List<Field> fields_;
   List<Procedure> procedures_;
+  const uint8_t* kernel_data_;
+  intptr_t kernel_data_size_;
 
   DISALLOW_COPY_AND_ASSIGN(Library);
 };