Fuchsia: Use new call to get thread CPU time

runtime/bin/thread_fuchsia.cc

Index: runtime/bin/thread_fuchsia.cc
diff --git a/runtime/bin/thread_fuchsia.cc b/runtime/bin/thread_fuchsia.cc
index fa5397ff131e138c50e7436be8be23242c9d1bf5..bd0d067b031a691297be921449ef2763d33551dd 100644
--- a/runtime/bin/thread_fuchsia.cc
+++ b/runtime/bin/thread_fuchsia.cc
@@ -8,9 +8,9 @@
 #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 <sys/resource.h>      // NOLINT
+#include <sys/time.h>          // NOLINT
 
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ -165,11 +165,6 @@ bool Thread::Compare(ThreadId a, ThreadId b) {
 }
 
 
-void Thread::GetThreadCpuUsage(ThreadId thread_id, int64_t* cpu_usage) {
-  UNIMPLEMENTED();
-}
-
-
 void Thread::InitOnce() {
   // Nothing to be done.
 }