[WIP] Implement notification sound loader

content/child/notifications/notification_sound_loader.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2015 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 "content/child/notifications/notification_image_loader.h"
+#include "content/child/notifications/notification_sound_loader.h"
 
 #include "base/logging.h"
 #include "base/thread_task_runner_handle.h"
 #include "content/child/child_thread_impl.h"
 #include "content/child/image_decoder.h"
 #include "third_party/WebKit/public/platform/Platform.h"
 #include "third_party/WebKit/public/platform/WebURL.h"
 #include "third_party/WebKit/public/platform/WebURLLoader.h"
 #include "third_party/WebKit/public/platform/WebURLRequest.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 using blink::WebURL;
 using blink::WebURLError;
 using blink::WebURLLoader;
 using blink::WebURLRequest;
 
 namespace content {
 
-NotificationImageLoader::NotificationImageLoader(
-    const ImageLoadCompletedCallback& callback,
+NotificationSoundLoader::NotificationSoundLoader(
+    const SoundLoadCompletedCallback& callback,
     const scoped_refptr<base::SingleThreadTaskRunner>& worker_task_runner)
     : callback_(callback),
       worker_task_runner_(worker_task_runner),
       notification_id_(0),
       completed_(false) {}
 
-NotificationImageLoader::~NotificationImageLoader() {
+NotificationSoundLoader::~NotificationSoundLoader() {
   if (main_thread_task_runner_)
     DCHECK(main_thread_task_runner_->BelongsToCurrentThread());
 }
 
-void NotificationImageLoader::StartOnMainThread(int notification_id,
+void NotificationSoundLoader::StartOnMainThread(int notification_id,
                                                 const GURL& image_url) {
   DCHECK(ChildThreadImpl::current());
   DCHECK(!url_loader_);
 
   main_thread_task_runner_ = base::ThreadTaskRunnerHandle::Get();
   notification_id_ = notification_id;
 
   WebURL image_web_url(image_url);
   WebURLRequest request(image_web_url);
   request.setRequestContext(WebURLRequest::RequestContextImage);
 
   url_loader_.reset(blink::Platform::current()->createURLLoader());
   url_loader_->loadAsynchronously(request, this);
 }
 
-void NotificationImageLoader::didReceiveData(
+void NotificationSoundLoader::didReceiveData(
     WebURLLoader* loader,
     const char* data,
     int data_length,
     int encoded_data_length) {
   DCHECK(!completed_);
   DCHECK_GT(data_length, 0);
 
   buffer_.insert(buffer_.end(), data, data + data_length);
 }
 
-void NotificationImageLoader::didFinishLoading(
+void NotificationSoundLoader::didFinishLoading(
     WebURLLoader* loader,
     double finish_time,
     int64_t total_encoded_data_length) {
   DCHECK(!completed_);
 
   RunCallbackOnWorkerThread();
 }
 
-void NotificationImageLoader::didFail(WebURLLoader* loader,
+void NotificationSoundLoader::didFail(WebURLLoader* loader,
                                       const WebURLError& error) {
   if (completed_)
     return;
 
   RunCallbackOnWorkerThread();
 }
 
-void NotificationImageLoader::RunCallbackOnWorkerThread() {
+void NotificationSoundLoader::RunCallbackOnWorkerThread() {
   url_loader_.reset();
 
   completed_ = true;
   SkBitmap icon = GetDecodedImage();
 
   if (worker_task_runner_->BelongsToCurrentThread()) {
     callback_.Run(notification_id_, icon);
   } else {
     worker_task_runner_->PostTask(
         FROM_HERE, base::Bind(callback_, notification_id_, icon));
   }
 }
 
-SkBitmap NotificationImageLoader::GetDecodedImage() const {
+SkBitmap NotificationSoundLoader::GetDecodedImage() const {
   DCHECK(completed_);
   if (buffer_.empty())
     return SkBitmap();
 
   ImageDecoder decoder;
   return decoder.Decode(&buffer_[0], buffer_.size());
 }
 
-void NotificationImageLoader::DeleteOnCorrectThread() const {
+void NotificationSoundLoader::DeleteOnCorrectThread() const {
   if (!ChildThreadImpl::current()) {
     main_thread_task_runner_->DeleteSoon(FROM_HERE, this);
     return;
   }
 
   delete this;
 }
 
 }  // namespace content