Use a fully qualified type name.

runtime/bin/main.cc

Index: runtime/bin/main.cc
diff --git a/runtime/bin/main.cc b/runtime/bin/main.cc
index 8e0a59543394eceb6e686bac39fe3da2ceadd4d4..24b1e284d1be5a6be709926c888b5952981032ad 100644
--- a/runtime/bin/main.cc
+++ b/runtime/bin/main.cc
@@ -913,7 +913,7 @@ static Dart_Isolate CreateIsolateAndSetupHelper(bool is_main_isolate,
       }
       if (!is_kernel) {
         free(const_cast<uint8_t*>(platform_file));
-        delete reinterpret_cast<kernel::Program*>(kernel_platform);
+        delete reinterpret_cast<dart::kernel::Program*>(kernel_platform);
         return NULL;
       }
     } else if (!isolate_run_app_snapshot) {