Add UMA for High Resolution Timer Usage

base/timer/hi_res_timer_manager_posix.cc

Index: base/timer/hi_res_timer_manager_posix.cc
diff --git a/base/timer/hi_res_timer_manager_posix.cc b/base/timer/hi_res_timer_manager_posix.cc
index d2f152c8c0120af4cc2202d3b571c0410bc85239..89012b9f61f80398fb02beee09a41947e79d4c2e 100644
--- a/base/timer/hi_res_timer_manager_posix.cc
+++ b/base/timer/hi_res_timer_manager_posix.cc
@@ -18,6 +18,10 @@ HighResolutionTimerManager::~HighResolutionTimerManager() {
 void HighResolutionTimerManager::OnPowerStateChange(bool on_battery_power) {
 }
 
+void HighResolutionTimerManager::OnSuspend() {}
+
+void HighResolutionTimerManager::OnResume() {}
+
 void HighResolutionTimerManager::UseHiResClock(bool use) {
 }