Make compositing mode sticky when RenderView is reused in LayoutTests.

content/renderer/render_widget.h

Index: content/renderer/render_widget.h
diff --git a/content/renderer/render_widget.h b/content/renderer/render_widget.h
index cfeb1e8fc7d48805fd8b96f99f1a6492b4095f6e..58d0f1b8b357eb5a6e683a91c2996707eec02756 100644
--- a/content/renderer/render_widget.h
+++ b/content/renderer/render_widget.h
@@ -657,11 +657,6 @@ class CONTENT_EXPORT RenderWidget
   // compositor.
   bool is_accelerated_compositing_active_;
 
-  // Set to true if compositing has ever been active for this widget. Once a
-  // widget has used compositing, it will act as though force compositing mode
-  // is on for the remainder of the widget's lifetime.
-  bool was_accelerated_compositing_ever_active_;
-
   base::OneShotTimer<RenderWidget> animation_timer_;
   bool animation_update_pending_;
   bool invalidation_task_posted_;