More accurate implementation of watched thread time for Gpu Watchdog.

base/time/time_win.cc

Index: base/time/time_win.cc
diff --git a/base/time/time_win.cc b/base/time/time_win.cc
index ad3c9914dbdc81cceff83b4698f43252a480ba8b..59e5997123d9e3b41604800c013b779818df010a 100644
--- a/base/time/time_win.cc
+++ b/base/time/time_win.cc
@@ -42,6 +42,7 @@
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/synchronization/lock.h"
+#include "base/threading/platform_thread.h"
 
 using base::ThreadTicks;
 using base::Time;
@@ -518,11 +519,17 @@ TimeTicks::Clock TimeTicks::GetClock() {
 
 // static
 ThreadTicks ThreadTicks::Now() {
+  return ThreadTicks::Now(PlatformThread::CurrentHandle());
+}
+
+// static
+ThreadTicks ThreadTicks::Now(const base::PlatformThreadHandle& thread_handle) {
   DCHECK(IsSupported());
 
   // Get the number of TSC ticks used by the current thread.
   ULONG64 thread_cycle_time = 0;
-  GetQueryThreadCycleTimeFunction()(::GetCurrentThread(), &thread_cycle_time);
+  GetQueryThreadCycleTimeFunction()(thread_handle.platform_handle(),

[fdoray, 2016/04/21 21:08:37]

We can call ::QueryThreadCycleTime() directly and remove
GetQueryThreadCycleTimeFunction() above now that we don't support XP.

[stanisc, 2016/04/22 01:11:45]

OK, I've removed GetQueryThreadCycleTimeFunction().

+                                    &thread_cycle_time);
 
   // Get the frequency of the TSC.
   double tsc_ticks_per_second = TSCTicksPerSecond();