viz: Call DidPresent when SwapAck is suppressed

Webview suppresses SwapAck because calling SwapAck synchronously will
mean it happens before DidSwap. However webview now requires
presentation feedbacks to go through the normal code path in viz, so
remove that check.

Change-Id: I63ec790da644325c5990b80648c93770aa826aab
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1570911
Commit-Queue: Bo <boliu@chromium.org>
Commit-Queue: Peng Huang <penghuang@chromium.org>
Auto-Submit: Bo <boliu@chromium.org>
Reviewed-by: Peng Huang <penghuang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#651731}

components/viz/service/display_embedder/skia_output_surface_impl_non_ddl.cc

@@ -579,8 +579,7 @@ bool SkiaOutputSurfaceImplNonDDL::GetGrBackendTexture(
 
 void SkiaOutputSurfaceImplNonDDL::BufferPresented(
     const gfx::PresentationFeedback& feedback) {
-  if (need_swapbuffers_ack_)
-    client_->DidReceivePresentationFeedback(feedback);
+  client_->DidReceivePresentationFeedback(feedback);
 }
 
 void SkiaOutputSurfaceImplNonDDL::ContextLost() {