Disable scheduler deadline task on battery power in Windows

cc/scheduler/scheduler_state_machine.h

Index: cc/scheduler/scheduler_state_machine.h
diff --git a/cc/scheduler/scheduler_state_machine.h b/cc/scheduler/scheduler_state_machine.h
index 887e4c743a34450bc1ec5013484c29cc932f4f9d..0a1e4225bdf1bc23aabb22fad58827af6e44e581 100644
--- a/cc/scheduler/scheduler_state_machine.h
+++ b/cc/scheduler/scheduler_state_machine.h
@@ -238,6 +238,10 @@ class CC_EXPORT SchedulerStateMachine {
 
   bool CouldSendBeginMainFrame() const;
 
+  void SetOnBatteryPower(bool on_battery_power) {
+    on_battery_power_ = on_battery_power;
+  }
+
   // TODO(zmo): This is temporary for debugging crbug.com/393331.
   // We should remove it afterwards.
   std::string GetStatesForDebugging() const;
@@ -314,6 +318,7 @@ class CC_EXPORT SchedulerStateMachine {
   bool skip_next_begin_main_frame_to_reduce_latency_;
   bool skip_begin_main_frame_to_reduce_latency_;
   bool continuous_painting_;
+  bool on_battery_power_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SchedulerStateMachine);