Aura: Compensate for round-off error in damage.

content/browser/renderer_host/render_widget_host_view_aura.cc

Index: content/browser/renderer_host/render_widget_host_view_aura.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.cc b/content/browser/renderer_host/render_widget_host_view_aura.cc
index e1d669688b62e4afe40b8548985fae400be20209..c7148fcedda604a284419e96ea19c5b25e6d6408 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura.cc
@@ -711,6 +711,12 @@ void RenderWidgetHostViewAura::AcceleratedSurfacePostSubBuffer(
             params_in_pixel.height,
         params_in_pixel.width,
         params_in_pixel.height));
+
+    // Damage may not have been DIP aligned, so inflate damage to compensate
+    // for any round-off error.
+    rect_to_paint.Inset(-1, -1);
+    rect_to_paint.Intersect(window_->bounds());
+
     window_->SchedulePaintInRect(rect_to_paint);
 
     if (!resize_locks_.empty()) {