Make --trace-natives respect the isolate filter.

runtime/vm/native_arguments.h

 // 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.
 
 #ifndef RUNTIME_VM_NATIVE_ARGUMENTS_H_
 #define RUNTIME_VM_NATIVE_ARGUMENTS_H_
 
 #include "platform/assert.h"
 #include "platform/memory_sanitizer.h"
 #include "vm/globals.h"
@@ skipping 51 matching lines @@
 
 #define CHECK_STACK_ALIGNMENT                                                  \
   {}
 #define VERIFY_ON_TRANSITION                                                   \
   {}
 #define DEOPTIMIZE_ALOT                                                        \
   {}
 
 #endif
 
-#ifndef PRODUCT
-#define TRACE_NATIVE_CALL(format, name)                                        \
-  if (FLAG_trace_natives) {                                                    \
-    OS::Print("Calling native: " format "\n", name);                           \
-  }
-#else
-#define TRACE_NATIVE_CALL(format, name)                                        \
-  do {                                                                         \
-  } while (0)
-#endif
-
 // Class NativeArguments is used to access arguments passed in from
 // generated dart code to a runtime function or a dart library native
 // function. It is also used to set the return value if any at the slot
 // reserved for return values.
 // All runtime function/dart library native functions have the
 // following signature:
 //   void function_name(NativeArguments arguments);
 // Inside the function, arguments are accessed as follows:
 //   const Instance& arg0 = Instance::CheckedHandle(arguments.ArgAt(0));
 //   const Smi& arg1 = Smi::CheckedHandle(arguments.ArgAt(1));
@@ skipping 152 matching lines @@
 
   Thread* thread_;      // Current thread pointer.
   intptr_t argc_tag_;   // Encodes argument count and invoked native call type.
   RawObject** argv_;    // Pointer to an array of arguments to runtime call.
   RawObject** retval_;  // Pointer to the return value area.
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_NATIVE_ARGUMENTS_H_