Adding status to swap complete

ui/ozone/platform/drm/gpu/page_flip_request.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/ozone/platform/drm/gpu/page_flip_request.h"
 
 #include "base/barrier_closure.h"
 
 namespace ui {
 
-PageFlipRequest::PageFlipRequest(int crtc_count, const base::Closure& callback)
-    : callback_(base::BarrierClosure(crtc_count, callback)) {
+PageFlipRequest::PageFlipRequest(
+    int crtc_count,
+    const base::Callback<void(gfx::SwapResult)>& callback)
+    : callback_(callback), count_(crtc_count), result_(gfx::SwapAck) {
 }
 
 PageFlipRequest::~PageFlipRequest() {
 }
 
-void PageFlipRequest::Signal() {
-  callback_.Run();
+void PageFlipRequest::Signal(gfx::SwapResult result) {
+  if (result != gfx::SwapAck)

[alexst (slow to review), 2015/04/29 17:53:37]

If one of these fails, we should fail. If we get fail followed by recreate
surface, we will lose the failure signal.

[achaulk, 2015/05/06 18:29:48]

Done.

+    result_ = result;
+  if (!base::AtomicRefCountDec(&count_)) {
+    callback_.Run(result_);
+    callback_.Reset();
+  }
 }
 
 }  // namespace ui