cc: Add SwapAck watchdog.

content/renderer/gpu/render_widget_compositor.cc

Index: content/renderer/gpu/render_widget_compositor.cc
diff --git a/content/renderer/gpu/render_widget_compositor.cc b/content/renderer/gpu/render_widget_compositor.cc
index 625418242e7e398bd75059b39c1e610e97fcf730..b84aaef2dbe75d1e715c940389026488b0c0b3c4 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -45,6 +45,7 @@
 #include "content/common/content_switches_internal.h"
 #include "content/common/gpu/client/context_provider_command_buffer.h"
 #include "content/public/common/content_client.h"
+#include "content/public/common/content_features.h"
 #include "content/public/common/content_switches.h"
 #include "content/renderer/gpu/render_widget_compositor_delegate.h"
 #include "content/renderer/input/input_handler_manager.h"
@@ -516,6 +517,10 @@ cc::LayerTreeSettings RenderWidgetCompositor::GenerateLayerTreeSettings(
       cmd.HasSwitch(switches::kIsRunningInMash))
     settings.use_external_begin_frame_source = false;
 
+  // crbug.com/602486
+  settings.swap_ack_watchdog_enabled =
+      base::FeatureList::IsEnabled(features::kSwapAckWatchdog);
+
   return settings;
 }