[Ozone-DRM] Fix double call of swap buffers callback on failure

ui/ozone/platform/drm/gpu/drm_window.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/drm_window.h"
 
 #include <drm_fourcc.h>
 
 #include "base/time/time.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 122 matching lines @@
     return;
   }
 
   last_submitted_planes_ = planes;
 
   if (!controller_) {
     callback.Run(gfx::SwapResult::SWAP_ACK);
     return;
   }
 
-  if (!controller_->SchedulePageFlip(last_submitted_planes_,
-                                     false /* test_only */, callback)) {
-    callback.Run(gfx::SwapResult::SWAP_FAILED);
-  }
+  // Controller should call the callback in all cases.
+  controller_->SchedulePageFlip(last_submitted_planes_, false /* test_only */,
+                                callback);
 }
 
 std::vector<OverlayCheck_Params> DrmWindow::TestPageFlip(
     const std::vector<OverlayCheck_Params>& overlays,
     ScanoutBufferGenerator* buffer_generator) {
   std::vector<OverlayCheck_Params> params;
   if (!controller_) {
     // Nothing much we can do here.
     return params;
   }
@@ skipping 150 matching lines @@
       if (!cursor_buffers_[i]->Initialize(
               info, false /* should_register_framebuffer */)) {
         LOG(FATAL) << "Failed to initialize cursor buffer";
         return;
       }
     }
   }
 }
 
 }  // namespace ui