Mac fullscreen low power: Ignore WasOccluded by low power window

ui/accelerated_widget_mac/accelerated_widget_mac.mm

 // Copyright 2014 The Chromium 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 "ui/accelerated_widget_mac/accelerated_widget_mac.h"
 
 #include <map>
 
 #include "base/lazy_instance.h"
 #include "base/mac/mac_util.h"
@@ skipping 106 matching lines @@
 
 void AcceleratedWidgetMac::ResetFullscreenLowPowerCoordinator() {
   DCHECK(fslp_coordinator_);
   fslp_coordinator_ = nullptr;
 }
 
 CALayer* AcceleratedWidgetMac::GetFullscreenLowPowerLayer() const {
   return fullscreen_low_power_layer_;
 }
 
+bool AcceleratedWidgetMac::MightBeInFullscreenLowPowerMode() const {
+  return fslp_coordinator_;
+}
+
 bool AcceleratedWidgetMac::HasFrameOfSize(
     const gfx::Size& dip_size) const {
   return last_swap_size_dip_ == dip_size;
 }
 
 void AcceleratedWidgetMac::GetVSyncParameters(
     base::TimeTicks* timebase, base::TimeDelta* interval) const {
   if (view_) {
     view_->AcceleratedWidgetGetVSyncParameters(timebase, interval);
   } else {
@@ skipping 160 matching lines @@
                                      fullscreen_low_power_ca_context_id,
                                      io_surface, pixel_size, scale_factor);
     if (vsync_timebase && vsync_interval) {
       accelerated_widget_mac->GetVSyncParameters(vsync_timebase,
                                                  vsync_interval);
     }
   }
 }
 
 }  // namespace ui