Remove mirrors in product mode

runtime/vm/bootstrap.cc

Index: runtime/vm/bootstrap.cc
diff --git a/runtime/vm/bootstrap.cc b/runtime/vm/bootstrap.cc
index 1868f07a3034bf1fd5d2ff207ba7b0a86e86e56a..8cb5d77959a201811b6f6610f17ec7738f822993 100644
--- a/runtime/vm/bootstrap.cc
+++ b/runtime/vm/bootstrap.cc
@@ -295,6 +295,11 @@ RawError* Bootstrap::LoadandCompileScripts() {
   for (intptr_t i = 0;
        bootstrap_libraries[i].index_ != ObjectStore::kNone;
        ++i) {
+#ifdef PRODUCT
+    if (bootstrap_libraries[i].index_ == ObjectStore::kMirrors) {
+      continue;
+    }
+#endif  // !PRODUCT
     uri = Symbols::New(bootstrap_libraries[i].uri_);
     lib = Library::LookupLibrary(uri);
     if (lib.IsNull()) {
@@ -310,6 +315,11 @@ RawError* Bootstrap::LoadandCompileScripts() {
   for (intptr_t i = 0;
        bootstrap_libraries[i].index_ != ObjectStore::kNone;
        ++i) {
+#ifdef PRODUCT
+    if (bootstrap_libraries[i].index_ == ObjectStore::kMirrors) {
+      continue;
+    }
+#endif  // PRODUCT
     uri = Symbols::New(bootstrap_libraries[i].uri_);
     lib = Library::LookupLibrary(uri);
     ASSERT(!lib.IsNull());