Repurpose NotificationBitmapFetcher to BitmapFetcher

chrome/browser/bitmap_fetcher.cc

+// Copyright 2013 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 "chrome/browser/bitmap_fetcher.h"
+
+#include "chrome/browser/profiles/profile.h"
+#include "content/public/browser/browser_thread.h"
+#include "net/url_request/url_fetcher.h"
+#include "net/url_request/url_request_status.h"
+
+namespace chrome {
+
+BitmapFetcher::BitmapFetcher(const GURL& url,
+                             BitmapFetcherDelegate* delegate)
+    : url_(url),
+      delegate_(delegate) {
+}
+
+BitmapFetcher::~BitmapFetcher() {}
+
+void BitmapFetcher::Start(Profile* profile) {
+  DCHECK(url_fetcher_ == NULL);
+  url_fetcher_.reset(net::URLFetcher::Create(url_, net::URLFetcher::GET, this));
+  url_fetcher_->SetRequestContext(profile->GetRequestContext());
+  url_fetcher_->Start();
+}
+
+// Methods inherited from URLFetcherDelegate.
+
+void BitmapFetcher::OnURLFetchComplete(const net::URLFetcher* source) {
+  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+
+  if (source->GetStatus().status() != net::URLRequestStatus::SUCCESS) {
+    ReportFailure();
+    return;
+  }
+
+  std::string image_data;
+  source->GetResponseAsString(&image_data);
+  image_decoder_ =
+      new ImageDecoder(this, image_data, ImageDecoder::DEFAULT_CODEC);
+
+  // Call start to begin decoding.  The ImageDecoder will call OnImageDecoded
+  // with the data when it is done.
+  scoped_refptr<base::MessageLoopProxy> task_runner =
+      content::BrowserThread::GetMessageLoopProxyForThread(
+          content::BrowserThread::UI);
+  image_decoder_->Start(task_runner);
+}
+
+void BitmapFetcher::OnURLFetchDownloadProgress(const net::URLFetcher* source,
+                                               int64 current,
+                                               int64 total) {
+  // Do nothing here.
+}
+
+// Methods inherited from ImageDecoder::Delegate.
+
+void BitmapFetcher::OnImageDecoded(const ImageDecoder* decoder,
+                                   const SkBitmap& decoded_image) {
+  // Make a copy of the bitmap which we pass back to the UI thread.
+  scoped_ptr<SkBitmap> bitmap(new SkBitmap());
+  decoded_image.deepCopyTo(bitmap.get(), decoded_image.getConfig());
+
+  // Report success.
+  delegate_->OnFetchComplete(url_, bitmap.get());
+}
+
+void BitmapFetcher::OnDecodeImageFailed(const ImageDecoder* decoder) {
+  ReportFailure();
+}
+
+void BitmapFetcher::ReportFailure() {
+  delegate_->OnFetchComplete(url_, NULL);
+}
+
+}  // namespace chrome