[Ozone] Extends the lifetime of VaapiWrapper

ui/gl/gl_image_memory.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/gl/gl_image_memory.h"
 
 #include "base/logging.h"
 #include "base/trace_event/trace_event.h"
 #include "ui/gfx/buffer_format_util.h"
 #include "ui/gl/gl_bindings.h"
@@ skipping 253 matching lines @@
   DCHECK(!IsCompressedFormat(format) || size_.height() % 4 == 0);
   memory_ = memory;
   format_ = format;
   return true;
 }
 
 void GLImageMemory::Destroy(bool have_context) {
   memory_ = nullptr;
 }
 
+bool GLImageMemory::IsValid() {
+  return memory_ != nullptr;
+}
+
 gfx::Size GLImageMemory::GetSize() {
   return size_;
 }
 
 unsigned GLImageMemory::GetInternalFormat() {
   return internalformat_;
 }
 
 bool GLImageMemory::BindTexImage(unsigned target) {
   return false;
@@ skipping 80 matching lines @@
   return false;
 }
 
 // static
 unsigned GLImageMemory::GetInternalFormatForTesting(BufferFormat format) {
   DCHECK(ValidFormat(format));
   return TextureFormat(format);
 }
 
 }  // namespace gl