Make --trace-natives respect the isolate filter.

runtime/vm/native_entry.cc

 // Copyright (c) 2011, 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/native_entry.h"
 
 #include "include/dart_api.h"
 
 #include "vm/bootstrap.h"
 #include "vm/code_patcher.h"
@@ skipping 253 matching lines @@
     StackZone stack_zone(arguments->thread());
     Zone* zone = stack_zone.GetZone();
 
     DartFrameIterator iterator;
     StackFrame* caller_frame = iterator.NextFrame();
 
     const Code& code = Code::Handle(zone, caller_frame->LookupDartCode());
     const Function& func = Function::Handle(zone, code.function());
 
     if (FLAG_trace_natives) {
-      OS::Print("Resolving native target for %s\n", func.ToCString());
+      THR_Print("Resolving native target for %s\n", func.ToCString());
     }
 
     target_function =
         ResolveNativeFunction(arguments->thread()->zone(), func,
                               &is_bootstrap_native, &is_auto_scope);
     ASSERT(target_function != NULL);
 
 #if defined(DEBUG)
     {
       NativeFunction current_function = NULL;
@@ skipping 28 matching lines @@
     } else if (is_auto_scope) {
       trampoline = StubCode::CallAutoScopeNative_entry()->code();
     } else {
       trampoline = StubCode::CallNoScopeNative_entry()->code();
     }
 
     CodePatcher::PatchNativeCallAt(caller_frame->pc(), code,
                                    patch_target_function, trampoline);
 
     if (FLAG_trace_natives) {
-      OS::Print("    -> %p (%s)\n", target_function,
+      THR_Print("    -> %p (%s)\n", target_function,
                 is_bootstrap_native ? "bootstrap" : "non-bootstrap");
     }
   }
   VERIFY_ON_TRANSITION;
 
   // Tail-call resolved target.
   if (is_bootstrap_native) {
     target_function(arguments);
   } else if (is_auto_scope) {
     // Because this call is within a compilation unit, Clang doesn't respect
     // the ABI alignment here.
     NativeEntry::AutoScopeNativeCallWrapperNoStackCheck(
         args, reinterpret_cast<Dart_NativeFunction>(target_function));
   } else {
     // Because this call is within a compilation unit, Clang doesn't respect
     // the ABI alignment here.
     NativeEntry::NoScopeNativeCallWrapperNoStackCheck(
         args, reinterpret_cast<Dart_NativeFunction>(target_function));
   }
 }
 #endif  // !defined(TARGET_ARCH_DBC)
 
 
 }  // namespace dart