Enable use_once_callback for //content/common/*.mojom

content/renderer/image_downloader/image_downloader_impl.cc

Index: content/renderer/image_downloader/image_downloader_impl.cc
diff --git a/content/renderer/image_downloader/image_downloader_impl.cc b/content/renderer/image_downloader/image_downloader_impl.cc
index 8d1eff8fcbfe9e8e3aabe58ab71373d7f48b5949..0cb07d31610fb1b551725ba01164551998a00d51 100644
--- a/content/renderer/image_downloader/image_downloader_impl.cc
+++ b/content/renderer/image_downloader/image_downloader_impl.cc
@@ -113,19 +113,19 @@ void ImageDownloaderImpl::DownloadImage(const GURL& image_url,
                                         bool is_favicon,
                                         uint32_t max_bitmap_size,
                                         bool bypass_cache,
-                                        const DownloadImageCallback& callback) {
+                                        DownloadImageCallback callback) {
   std::vector<SkBitmap> result_images;
   std::vector<gfx::Size> result_original_image_sizes;
 
   ImageDownloaderBase::DownloadImage(
       image_url, is_favicon, bypass_cache,
       base::Bind(&ImageDownloaderImpl::DidDownloadImage, base::Unretained(this),
-                 max_bitmap_size, callback));
+                 max_bitmap_size, base::Passed(&callback)));
 }
 
 void ImageDownloaderImpl::DidDownloadImage(
     uint32_t max_image_size,
-    const DownloadImageCallback& callback,
+    DownloadImageCallback callback,
     int32_t http_status_code,
     const std::vector<SkBitmap>& images) {
   std::vector<SkBitmap> result_images;
@@ -133,7 +133,8 @@ void ImageDownloaderImpl::DidDownloadImage(
   FilterAndResizeImagesForMaximalSize(images, max_image_size, &result_images,
                                       &result_original_image_sizes);
 
-  callback.Run(http_status_code, result_images, result_original_image_sizes);
+  std::move(callback).Run(http_status_code, result_images,
+                          result_original_image_sizes);
 }
 
 void ImageDownloaderImpl::OnDestruct() {