Fix Mac build

runtime/vm/profiler.cc

 // Copyright (c) 2013, 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 "platform/address_sanitizer.h"
 #include "platform/memory_sanitizer.h"
 #include "platform/utils.h"
 
 #include "vm/allocation.h"
 #include "vm/atomic.h"
@@ skipping 935 matching lines @@
   ASSERT(os_thread != NULL);
   Isolate* isolate = thread->isolate();
   if (!CheckIsolate(isolate)) {
     return;
   }
 
   const bool exited_dart_code = thread->HasExitedDartCode();
 
   OS::Print("Dumping %s stack trace for thread %" Px "\n",
             native_stack_trace ? "native" : "dart-only",
-            static_cast<uintptr_t>(os_thread->trace_id()));
+            OSThread::ThreadIdToIntPtr(os_thread->trace_id()));
 
   uintptr_t sp = Thread::GetCurrentStackPointer();
   uintptr_t fp = 0;
   uintptr_t pc = GetProgramCounter();
 
   COPY_FP_REGISTER(fp);
 
   uword stack_lower = 0;
   uword stack_upper = 0;
 
@@ skipping 596 matching lines @@
 
 
 ProcessedSampleBuffer::ProcessedSampleBuffer()
     : code_lookup_table_(new CodeLookupTable(Thread::Current())) {
   ASSERT(code_lookup_table_ != NULL);
 }
 
 #endif  // !PRODUCT
 
 }  // namespace dart