Fix gen_snapshot product mode build

runtime/vm/dart_api_impl.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "include/dart_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 
 #include "platform/assert.h"
 #include "lib/stacktrace.h"
@@ skipping 5496 matching lines @@
   const Library& lib = Api::UnwrapLibraryHandle(Z, library);
   if (lib.IsNull()) {
     RETURN_TYPE_ERROR(Z, library, Library);
   }
   const String& url = String::Handle(Z, lib.url());
   ASSERT(!url.IsNull());
   return Api::NewHandle(T, url.raw());
 }
 
 
+DART_EXPORT Dart_Handle Dart_GetLoadedLibraries() {
+  DARTSCOPE(Thread::Current());
+  Isolate* I = T->isolate();
+
+  const GrowableObjectArray& libs =
+      GrowableObjectArray::Handle(Z, I->object_store()->libraries());
+  int num_libs = libs.Length();
+
+  // Create new list and populate with the loaded libraries.
+  Library& lib = Library::Handle();
+  const Array& library_list = Array::Handle(Z, Array::New(num_libs));
+  for (int i = 0; i < num_libs; i++) {
+    lib ^= libs.At(i);
+    ASSERT(!lib.IsNull());
+    library_list.SetAt(i, lib);
+  }
+  return Api::NewHandle(T, library_list.raw());
+}
+
+
 DART_EXPORT Dart_Handle Dart_LookupLibrary(Dart_Handle url) {
   DARTSCOPE(Thread::Current());
   const String& url_str = Api::UnwrapStringHandle(Z, url);
   if (url_str.IsNull()) {
     RETURN_TYPE_ERROR(Z, url, String);
   }
   const Library& library =
       Library::Handle(Z, Library::LookupLibrary(T, url_str));
   if (library.IsNull()) {
     return Api::NewError("%s: library '%s' not found.", CURRENT_FUNC,
@@ skipping 1097 matching lines @@
 
 DART_EXPORT bool Dart_IsPrecompiledRuntime() {
 #if defined(DART_PRECOMPILED_RUNTIME)
   return true;
 #else
   return false;
 #endif
 }
 
 }  // namespace dart