Add SkBitmap StructTraits for skia::mojo::Bitmap.

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 774b23477ec8263b22dc939eed455908d1d12e0d..cf30283b7e18dcaf692637b949c31343eabbfbd5 100644
--- a/content/renderer/image_downloader/image_downloader_impl.cc
+++ b/content/renderer/image_downloader/image_downloader_impl.cc
@@ -16,7 +16,6 @@
 #include "mojo/common/url_type_converters.h"
 #include "net/base/data_url.h"
 #include "skia/ext/image_operations.h"
-#include "skia/public/type_converters.h"
 #include "third_party/WebKit/public/platform/WebURLRequest.h"
 #include "third_party/WebKit/public/platform/WebVector.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
@@ -220,8 +219,7 @@ void ImageDownloaderImpl::ReplyDownloadResult(
     const std::vector<SkBitmap>& result_images,
     const std::vector<gfx::Size>& result_original_image_sizes,
     const DownloadImageCallback& callback) {
-  callback.Run(http_status_code,
-               mojo::Array<skia::mojom::BitmapPtr>::From(result_images),
+  callback.Run(http_status_code, mojo::Array<SkBitmap>::From(result_images),
                mojo::Array<mojo::SizePtr>::From(result_original_image_sizes));
 }