Adding status to swap complete

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

Index: ui/ozone/platform/drm/gpu/page_flip_request.cc
diff --git a/ui/ozone/platform/drm/gpu/page_flip_request.cc b/ui/ozone/platform/drm/gpu/page_flip_request.cc
index dfca208874abcfd17c8d9941362c1b202328aa7d..d52573ba6ff8273477307b9a1406efc7cd8caafe 100644
--- a/ui/ozone/platform/drm/gpu/page_flip_request.cc
+++ b/ui/ozone/platform/drm/gpu/page_flip_request.cc
@@ -8,15 +8,22 @@
 
 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