cc: Drop skip debug border that's too big

Some debug border are sized to the size of a layer which can be
arbitrarily large. It will fail deserialization if the area overflows
int. Simply drop these borders to avoid renderer being killed.

Bug: 1066139
Change-Id: Ie51e327383fd594ac5cb551a94b945f9645fa7f4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2134187Reviewed-by: danakj <danakj@chromium.org>
Commit-Queue: Bo <boliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#755877}

cc/layers/layer_impl.cc

@@ -258,6 +258,12 @@ void LayerImpl::AppendDebugBorderQuad(
   if (!ShowDebugBorders(DebugBorderType::LAYER))
     return;
 
+  // This is the debug border quad layer size. The mojo serialization will fail
+  // if the area overflows, so just drop this debug border quad in that case to
+  // avoid crashes.
+  if (!quad_rect.size().GetCheckedArea().IsValid())
+    return;
+
   gfx::Rect visible_quad_rect(quad_rect);
   auto* debug_border_quad =
       render_pass->CreateAndAppendDrawQuad<viz::DebugBorderDrawQuad>();