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

chrome/browser/image_decoder.cc

Index: chrome/browser/image_decoder.cc
diff --git a/chrome/browser/image_decoder.cc b/chrome/browser/image_decoder.cc
index e1de584848d053854f9939c1e11d7e2fe4490330..adb15c3fcb7784a4c870da9164d4d9e42fd94d9d 100644
--- a/chrome/browser/image_decoder.cc
+++ b/chrome/browser/image_decoder.cc
@@ -13,7 +13,6 @@
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/utility_process_host.h"
 #include "content/public/common/service_registry.h"
-#include "skia/public/type_converters.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/base/l10n/l10n_util.h"
 
@@ -32,16 +31,13 @@ const int kBatchModeTimeoutSeconds = 5;
 void OnDecodeImageDone(
     base::Callback<void(int)> fail_callback,
     base::Callback<void(const SkBitmap&, int)> success_callback,
-    int request_id, skia::mojom::BitmapPtr image) {
+    int request_id,
+    const SkBitmap& image) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  if (image) {
-    SkBitmap bitmap = image.To<SkBitmap>();
-    if (!bitmap.empty()) {
-      success_callback.Run(bitmap, request_id);
-      return;
-    }
-  }
-  fail_callback.Run(request_id);
+  if (!image.isNull() && !image.empty())
+    success_callback.Run(image, request_id);
+  else
+    fail_callback.Run(request_id);
 }
 
 }  // namespace