Change mojo geometry structs from using type converters to StructTraits.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index dd59a10f8f7b2254f97b02da59e65e6f04d69c78..e0ff6858a82daeb8560e4a1486ab40ef2e681f50 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -115,7 +115,6 @@
 #include "content/public/common/url_utils.h"
 #include "content/public/common/web_preferences.h"
 #include "mojo/common/url_type_converters.h"
-#include "mojo/converters/geometry/geometry_type_converters.h"
 #include "net/base/url_util.h"
 #include "net/http/http_cache.h"
 #include "net/http/http_transaction_factory.h"
@@ -4842,12 +4841,11 @@ void WebContentsImpl::OnDidDownloadImage(
     const GURL& image_url,
     int32_t http_status_code,
     mojo::Array<skia::mojom::BitmapPtr> images,
-    mojo::Array<mojo::SizePtr> original_image_sizes) {
+    mojo::Array<gfx::Size> original_image_sizes) {
   const std::vector<SkBitmap> bitmaps = images.To<std::vector<SkBitmap>>();
-  const std::vector<gfx::Size> sizes =
-      original_image_sizes.To<std::vector<gfx::Size>>();
 
-  callback.Run(id, http_status_code, image_url, bitmaps, sizes);
+  callback.Run(id, http_status_code, image_url, bitmaps,
+               original_image_sizes.PassStorage());
 }
 
 void WebContentsImpl::OnDialogClosed(int render_process_id,