Remove a DCHECK() which causes crash on macOS

current_frame()->current_render_pass is set in
DirectRenderer::UseRenderPass() for rendering a render pass. However it
is not set back to nullptr, after rendering the render pass. So the
DCHECK() is wrong.

Bug: 1147583
Change-Id: I9d52ce734488802619b1d3935b8edb618a3c070e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2536590
Auto-Submit: Peng Huang <penghuang@chromium.org>
Commit-Queue: Vasiliy Telezhnikov <vasilyt@chromium.org>
Reviewed-by: Vasiliy Telezhnikov <vasilyt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827250}

components/viz/service/display/skia_renderer.cc

@@ -2613,7 +2613,6 @@ void SkiaRenderer::PrepareRenderPassOverlay(CALayerOverlay* overlay) {
   // the |current_render_pass| is nullptr during ScheduleOverlays(), since all
   // overlay quads should be in the |root_render_pass|, before they are promoted
   // to overlays, so set the |root_render_pass| to the |current_render_pass|.
-  DCHECK(!current_frame()->current_render_pass);
   base::AutoReset<const AggregatedRenderPass*> auto_reset(
       &current_frame()->current_render_pass, current_frame()->root_render_pass);