Enable ThreadTicks on Windows.

src/base/platform/time.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/base/platform/time.h"
 
 #if V8_OS_POSIX
 #include <fcntl.h>  // for O_RDONLY
 #include <sys/time.h>
 #include <unistd.h>
@@ skipping 600 matching lines @@
 
 
 // static
 bool TimeTicks::IsHighResolutionClockWorking() {
   return true;
 }
 
 #endif  // V8_OS_WIN
 
 
-// TODO(lpy): For windows ThreadTicks implementation,
-// see http://crbug.com/v8/5000
 bool ThreadTicks::IsSupported() {
 #if (defined(_POSIX_THREAD_CPUTIME) && (_POSIX_THREAD_CPUTIME >= 0)) || \
-    defined(V8_OS_MACOSX) || defined(V8_OS_ANDROID)
-    return true;
+  defined(V8_OS_MACOSX) || defined(V8_OS_ANDROID)
+  return true;
+#elif defined(V8_OS_WIN)
+  return IsSupportedWin();
 #else
-    return false;
+  return false;
 #endif
 }
 
 
 ThreadTicks ThreadTicks::Now() {
 #if V8_OS_MACOSX
   return ThreadTicks(ComputeThreadTicks());
 #elif(defined(_POSIX_THREAD_CPUTIME) && (_POSIX_THREAD_CPUTIME >= 0)) || \
   defined(V8_OS_ANDROID)
   return ThreadTicks(ClockNow(CLOCK_THREAD_CPUTIME_ID));
@@ skipping 93 matching lines @@
   DCHECK_GE(tsc_now, tsc_initial);
   uint64_t tsc_ticks = tsc_now - tsc_initial;
   tsc_ticks_per_second = tsc_ticks / elapsed_time_seconds;
 
   return tsc_ticks_per_second;
 }
 #endif  // V8_OS_WIN
 
 }  // namespace base
 }  // namespace v8