Various vmservice/observatory fixes:

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/cpu.h"
@@ skipping 9098 matching lines @@
   return temp_class.Evaluate(expr, param_names, param_values);
 }
 
 
 void Library::InitNativeWrappersLibrary(Isolate* isolate) {
   static const int kNumNativeWrappersClasses = 4;
   ASSERT(kNumNativeWrappersClasses > 0 && kNumNativeWrappersClasses < 10);
   const String& native_flds_lib_url = Symbols::DartNativeWrappers();
   const Library& native_flds_lib = Library::Handle(
       Library::NewLibraryHelper(native_flds_lib_url, false));
+  const String& native_flds_lib_name = Symbols::DartNativeWrappersLibName();
+  native_flds_lib.SetName(native_flds_lib_name);
   native_flds_lib.Register();
   isolate->object_store()->set_native_wrappers_library(native_flds_lib);
   static const char* const kNativeWrappersClass = "NativeFieldWrapperClass";
   static const int kNameLength = 25;
   ASSERT(kNameLength == (strlen(kNativeWrappersClass) + 1 + 1));
   char name_buffer[kNameLength];
   String& cls_name = String::Handle();
   for (int fld_cnt = 1; fld_cnt <= kNumNativeWrappersClasses; fld_cnt++) {
     OS::SNPrint(name_buffer,
                 kNameLength,
@@ skipping 9647 matching lines @@
   return tag_label.ToCString();
 }
 
 
 void UserTag::PrintJSONImpl(JSONStream* stream, bool ref) const {
   Instance::PrintJSONImpl(stream, ref);
 }
 
 
 }  // namespace dart