[gardening] Revert "Eliminate dependencies on assemblers and code stubs in precompiled runtime."

runtime/vm/dart.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 "vm/dart.h"
 
 #include "vm/become.h"
 #include "vm/clustered_snapshot.h"
 #include "vm/code_observers.h"
 #include "vm/cpu.h"
@@ skipping 184 matching lines @@
       const Snapshot* snapshot = Snapshot::SetupFromBuffer(vm_isolate_snapshot);
       if (snapshot == NULL) {
         return strdup("Invalid vm isolate snapshot seen");
       }
       vm_snapshot_kind_ = snapshot->kind();
 
       if (Snapshot::IncludesCode(vm_snapshot_kind_)) {
         if (vm_snapshot_kind_ == Snapshot::kFullAOT) {
 #if defined(DART_PRECOMPILED_RUNTIME)
           vm_isolate_->set_compilation_allowed(false);
+          if (!FLAG_precompiled_runtime) {
+            return strdup("Flag --precompilation was not specified");
+          }
 #else
           return strdup("JIT runtime cannot run a precompiled snapshot");
 #endif
         }
         if (instructions_snapshot == NULL) {
           return strdup("Missing instructions snapshot");
         }
       } else if (Snapshot::IsFull(vm_snapshot_kind_)) {
 #if defined(DART_PRECOMPILED_RUNTIME)
         return strdup("Precompiled runtime requires a precompiled snapshot");
@@ skipping 530 matching lines @@
   ASSERT(predefined_handles_ != NULL);
   return predefined_handles_->handles_.IsValidScopedHandle(address);
 }
 
 bool Dart::IsReadOnlyApiHandle(Dart_Handle handle) {
   ASSERT(predefined_handles_ != NULL);
   return predefined_handles_->api_handles_.IsValidHandle(handle);
 }
 
 }  // namespace dart