- Add a per-isolate pseudo random number generator to the

runtime/vm/isolate.cc

Index: runtime/vm/isolate.cc
===================================================================
--- runtime/vm/isolate.cc	(revision 29938)
+++ runtime/vm/isolate.cc	(working copy)
@@ -290,6 +290,7 @@
       stub_code_(NULL),
       debugger_(NULL),
       single_step_(false),
+      random_(),
       simulator_(NULL),
       long_jump_base_(NULL),
       timer_list_(),
@@ -726,6 +727,7 @@
 Dart_FileReadCallback Isolate::file_read_callback_ = NULL;
 Dart_FileWriteCallback Isolate::file_write_callback_ = NULL;
 Dart_FileCloseCallback Isolate::file_close_callback_ = NULL;
+Dart_EntropySource Isolate::entropy_source_callback_ = NULL;
 Dart_IsolateInterruptCallback Isolate::vmstats_callback_ = NULL;