Fixes black flash when accelerated composited paints the tab background

content/browser/renderer_host/render_widget_host_view_aura.h

Index: content/browser/renderer_host/render_widget_host_view_aura.h
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.h b/content/browser/renderer_host/render_widget_host_view_aura.h
index 1af24875bab73dd4344c31c6eb54fde6ab3133dd..027c93e2472639c071a8597165059f66d452bcea 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.h
+++ b/content/browser/renderer_host/render_widget_host_view_aura.h
@@ -323,9 +323,10 @@ class RenderWidgetHostViewAura
   // events vs. normal mouse move events.
   bool synthetic_move_sent_;
 
-  // Signals we need to switch off the external texture as soon as the software
-  // backing store is updated.
-  bool needs_update_texture_;
+  // Signals that the accelerated compositing has been turned on or off.
+  // This is used to signal to turn off the external texture as soon as the
+  // software backing store is updated.
+  bool accelerated_compositing_state_changed_;
 
   // Used to prevent further resizes while a resize is pending.
   class ResizeLock;