Move all the isolate reload code under !defined(DART_PRECOMPILED_RUNTIME)

runtime/vm/isolate_reload.h

Index: runtime/vm/isolate_reload.h
diff --git a/runtime/vm/isolate_reload.h b/runtime/vm/isolate_reload.h
index f8b68265ddba0f351f1d7b70039391cb1a8b80b4..83bfc8246492daf354cfb8bdc698a2cf6cd4bd93 100644
--- a/runtime/vm/isolate_reload.h
+++ b/runtime/vm/isolate_reload.h
@@ -34,6 +34,8 @@ DECLARE_FLAG(bool, trace_reload_verbose);
   if (FLAG_trace_reload_verbose) Log::Current()->Print(format, ##__VA_ARGS__)
 #endif
 
+#if !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
+
 namespace dart {
 
 class BitVector;
@@ -359,4 +361,6 @@ class IsolateReloadContext {
 
 }  // namespace dart
 
+#endif  // !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
+
 #endif  // RUNTIME_VM_ISOLATE_RELOAD_H_