Enable fire-and-forget Destroy of HW video decoder, and misc other improvements.

ppapi/cpp/dev/video_decoder_dev.cc

 // Copyright (c) 2011 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 "ppapi/cpp/dev/video_decoder_dev.h"
 
 #include "ppapi/c/dev/ppb_video_decoder_dev.h"
 #include "ppapi/c/dev/ppp_video_decoder_dev.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/cpp/dev/context_3d_dev.h"
@@ skipping 14 matching lines @@
 VideoDecoder_Dev::VideoDecoder_Dev(const Instance& instance) {
   if (!has_interface<PPB_VideoDecoder_Dev>())
     return;
   PassRefFromConstructor(get_interface<PPB_VideoDecoder_Dev>()->Create(
       instance.pp_instance()));
 }
 
 VideoDecoder_Dev::VideoDecoder_Dev(PP_Resource resource) : Resource(resource) {
 }
 
-VideoDecoder_Dev::~VideoDecoder_Dev() {}
+VideoDecoder_Dev::~VideoDecoder_Dev() {
+  get_interface<PPB_VideoDecoder_Dev>()->Destroy(pp_resource());
+}
+
 
 int32_t VideoDecoder_Dev::Initialize(const PP_VideoConfigElement* config,
                                      const Context3D_Dev& context,
                                      CompletionCallback callback) {
   if (!has_interface<PPB_VideoDecoder_Dev>())
     return callback.MayForce(PP_ERROR_NOINTERFACE);
   return get_interface<PPB_VideoDecoder_Dev>()->Initialize(
       pp_resource(), context.pp_resource(), config,
       callback.pp_completion_callback());
 }
@@ skipping 29 matching lines @@
       pp_resource(), callback.pp_completion_callback());
 }
 
 int32_t VideoDecoder_Dev::Reset(CompletionCallback callback) {
   if (!has_interface<PPB_VideoDecoder_Dev>())
     return callback.MayForce(PP_ERROR_NOINTERFACE);
   return get_interface<PPB_VideoDecoder_Dev>()->Reset(
       pp_resource(), callback.pp_completion_callback());
 }
 
-int32_t VideoDecoder_Dev::Destroy(CompletionCallback callback) {
-  if (!has_interface<PPB_VideoDecoder_Dev>())
-    return callback.MayForce(PP_ERROR_NOINTERFACE);
-  return get_interface<PPB_VideoDecoder_Dev>()->Destroy(
-      pp_resource(), callback.pp_completion_callback());
-}
-
 }  // namespace pp