Only reload libraries when they may have been modified.

runtime/vm/object.cc

 // Copyright (c) 2012, 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/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/become.h"
@@ skipping 8798 matching lines @@
   UNREACHABLE();
   return NULL;
 }
 
 
 void Script::set_url(const String& value) const {
   StorePointer(&raw_ptr()->url_, value.raw());
 }
 
 
+void Script::set_resolved_url(const String& value) const {
+  StorePointer(&raw_ptr()->resolved_url_, value.raw());
+}
+
+
 void Script::set_source(const String& value) const {
   StorePointer(&raw_ptr()->source_, value.raw());
 }
 
 
 void Script::set_kind(RawScript::Kind value) const {
   StoreNonPointer(&raw_ptr()->kind_, value);
 }
 
 
@@ skipping 242 matching lines @@
   RawObject* raw = Object::Allocate(Script::kClassId,
                                     Script::InstanceSize(),
                                     Heap::kOld);
   return reinterpret_cast<RawScript*>(raw);
 }
 
 
 RawScript* Script::New(const String& url,
                        const String& source,
                        RawScript::Kind kind) {
+  return Script::New(url, url, source, kind);
+}
+
+
+RawScript* Script::New(const String& url,
+                       const String& resolved_url,
+                       const String& source,
+                       RawScript::Kind kind) {
   Thread* thread = Thread::Current();
   Zone* zone = thread->zone();
   const Script& result = Script::Handle(zone, Script::New());
   result.set_url(String::Handle(zone, Symbols::New(thread, url)));
+  result.set_resolved_url(
+      String::Handle(zone, Symbols::New(thread, resolved_url)));
   result.set_source(source);
   result.set_kind(kind);
   result.set_load_timestamp(FLAG_remove_script_timestamps_for_test
                             ? 0 : OS::GetCurrentTimeMillis());
   result.SetLocationOffset(0, 0);
   return result.raw();
 }
 
 
 const char* Script::ToCString() const {
@@ skipping 13606 matching lines @@
   return UserTag::null();
 }
 
 
 const char* UserTag::ToCString() const {
   const String& tag_label = String::Handle(label());
   return tag_label.ToCString();
 }
 
 }  // namespace dart