VM: Support bootstrapping core libraries from Kernel binaries instead of source.

runtime/vm/kernel_to_il.h

Index: runtime/vm/kernel_to_il.h
diff --git a/runtime/vm/kernel_to_il.h b/runtime/vm/kernel_to_il.h
index 50014516babf72684bfd9d747045d1341a422c2b..8edcfb392ff64f33acb480871f09e4dd4ae51490 100644
--- a/runtime/vm/kernel_to_il.h
+++ b/runtime/vm/kernel_to_il.h
@@ -202,11 +202,6 @@ class TranslationHelper {
 
   Heap::Space allocation_space() { return allocation_space_; }
 
-  // Set whether unfinalized classes should be finalized.  The base class
-  // implementation used at flow graph construction time looks up classes in the
-  // VM's heap, all of which should already be finalized.
-  virtual void SetFinalize(bool finalize) {}
-
   RawInstance* Canonicalize(const Instance& instance);
 
   const dart::String& DartString(const char* content) {
@@ -241,6 +236,8 @@ class TranslationHelper {
   virtual RawLibrary* LookupLibraryByKernelLibrary(Library* library);
   virtual RawClass* LookupClassByKernelClass(Class* klass);
 
+  RawUnresolvedClass* ToUnresolvedClass(Class* klass);
+
   RawField* LookupFieldByKernelField(Field* field);
   RawFunction* LookupStaticMethodByKernelProcedure(Procedure* procedure);
   RawFunction* LookupConstructorByKernelConstructor(Constructor* constructor);
@@ -282,7 +279,7 @@ class DartTypeTranslator : public DartTypeVisitor {
  public:
   DartTypeTranslator(TranslationHelper* helper,
                      ActiveClass* active_class,
-                     bool finalize = true)
+                     bool finalize = false)
       : translation_helper_(*helper),
         active_class_(active_class),
         zone_(helper->zone()),
@@ -501,7 +498,9 @@ class ScopeBuilder : public RecursiveVisitor {
         node_(node),
         zone_(Thread::Current()->zone()),
         translation_helper_(Thread::Current(), zone_, Isolate::Current()),
-        type_translator_(&translation_helper_, &active_class_),
+        type_translator_(&translation_helper_,
+                         &active_class_,
+                         /*finalize=*/ true),
         current_function_scope_(NULL),
         scope_(NULL),
         depth_(0),