Fuchsia: Use new call to get thread CPU time

runtime/bin/thread_win.cc

Index: runtime/bin/thread_win.cc
diff --git a/runtime/bin/thread_win.cc b/runtime/bin/thread_win.cc
index b491a512c65f212908d98fcbcaa6a610157cfd6b..2bb09429bf1d5ef285a938df2d934c051bb4a982 100644
--- a/runtime/bin/thread_win.cc
+++ b/runtime/bin/thread_win.cc
@@ -114,35 +114,6 @@ bool Thread::Compare(ThreadId a, ThreadId b) {
 }
 
 
-void Thread::GetThreadCpuUsage(ThreadId thread_id, int64_t* cpu_usage) {
-  static const int64_t kTimeEpoc = 116444736000000000LL;
-  static const int64_t kTimeScaler = 10;  // 100 ns to us.
-  // Although win32 uses 64-bit integers for representing timestamps,
-  // these are packed into a FILETIME structure. The FILETIME
-  // structure is just a struct representing a 64-bit integer. The
-  // TimeStamp union allows access to both a FILETIME and an integer
-  // representation of the timestamp. The Windows timestamp is in
-  // 100-nanosecond intervals since January 1, 1601.
-  union TimeStamp {
-    FILETIME ft_;
-    int64_t t_;
-  };
-  ASSERT(cpu_usage != NULL);
-  TimeStamp created;
-  TimeStamp exited;
-  TimeStamp kernel;
-  TimeStamp user;
-  HANDLE handle = OpenThread(THREAD_QUERY_INFORMATION, false, thread_id);
-  BOOL result =
-      GetThreadTimes(handle, &created.ft_, &exited.ft_, &kernel.ft_, &user.ft_);
-  CloseHandle(handle);
-  if (!result) {
-    FATAL1("GetThreadCpuUsage failed %d\n", GetLastError());
-  }
-  *cpu_usage = (user.t_ - kTimeEpoc) / kTimeScaler;
-}
-
-
 void Thread::SetThreadLocal(ThreadLocalKey key, uword value) {
   ASSERT(key != kUnsetThreadLocalKey);
   BOOL result = TlsSetValue(key, reinterpret_cast<void*>(value));