Fuchsia: Use new call to get thread CPU time

runtime/bin/thread_fuchsia.cc

 // Copyright (c) 2016, 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/globals.h"
 #if defined(TARGET_OS_FUCHSIA)
 
 #include "bin/thread.h"
 #include "bin/thread_fuchsia.h"
 
-#include <errno.h>         // NOLINT
-#include <sys/resource.h>  // NOLINT
-#include <sys/time.h>      // NOLINT
+#include <errno.h>             // NOLINT
+#include <magenta/syscalls.h>  // NOLINT
+#include <magenta/types.h>     // NOLINT
+#include <sys/resource.h>      // NOLINT
+#include <sys/time.h>          // NOLINT
 
 #include "platform/assert.h"
 #include "platform/utils.h"
 
 namespace dart {
 namespace bin {
 
 #define VALIDATE_PTHREAD_RESULT(result)                                        \
   if (result != 0) {                                                           \
     const int kBufferSize = 1024;                                              \
@@ skipping 134 matching lines @@
   ASSERT(sizeof(id) == sizeof(intptr_t));
   return static_cast<intptr_t>(id);
 }
 
 
 bool Thread::Compare(ThreadId a, ThreadId b) {
   return (pthread_equal(a, b) != 0);
 }
 
 
 void Thread::GetThreadCpuUsage(ThreadId thread_id, int64_t* cpu_usage) {

[rmacnak, 2017/01/06 18:34:24]

bin::Thread::GetThreadCpuUsage is unused. We should remove it.

[zra, 2017/01/07 22:45:17]

Done.

-  UNIMPLEMENTED();
+  ASSERT(thread_id == GetCurrentThreadId());
+  ASSERT(cpu_usage != NULL);
+  *cpu_usage = mx_time_get(MX_CLOCK_THREAD) / kNanosecondsPerMicrosecond;
 }
 
 
 void Thread::InitOnce() {
   // Nothing to be done.
 }
 
 
 Mutex::Mutex() {
   pthread_mutexattr_t attr;
@@ skipping 140 matching lines @@
 void Monitor::NotifyAll() {
   // TODO(iposva): Do we need to track lock owners?
   int result = pthread_cond_broadcast(data_.cond());
   VALIDATE_PTHREAD_RESULT(result);
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_FUCHSIA)