ozone: Consolidate primary plane format.

ui/display/types/display_snapshot.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/display/types/display_snapshot.h"
 
 #include <algorithm>
 
 namespace ui {
 
@@ skipping 38 matching lines @@
   // We must explicitly clear out the bytes that represent the serial number.
   const size_t end =
       std::min(kSerialNumberBeginingByte + kSerialNumberLengthInBytes,
                edid_.size());
   for (size_t i = kSerialNumberBeginingByte; i < end; ++i)
     edid_[i] = 0;
 }
 
 DisplaySnapshot::~DisplaySnapshot() {}
 
+// static
+gfx::BufferFormat DisplaySnapshot::PrimaryFormat() {
+  return gfx::BufferFormat::BGRX_8888;
+}
+
 }  // namespace ui