Provide StructTraits for a vector<SkBitmap>

skia/public/interfaces/test/traits_test_service.mojom

Index: skia/public/interfaces/test/traits_test_service.mojom
diff --git a/skia/public/interfaces/test/traits_test_service.mojom b/skia/public/interfaces/test/traits_test_service.mojom
index eaa829e8163329b4d5759510b75d83dfb25e2dfe..9f76be565d2e67be57c70c7f64255dc3f467f29c 100644
--- a/skia/public/interfaces/test/traits_test_service.mojom
+++ b/skia/public/interfaces/test/traits_test_service.mojom
@@ -5,6 +5,7 @@
 module skia.mojom;
 
 import "skia/public/interfaces/bitmap.mojom";
+import "skia/public/interfaces/bitmap_array.mojom";
 import "skia/public/interfaces/image_filter.mojom";
 
 // All functions on this interface echo their arguments to test StructTraits
@@ -14,5 +15,8 @@ interface TraitsTestService {
   EchoBitmap(Bitmap b) => (Bitmap pass);
 
   [Sync]
+  EchoBitmapArray(BitmapArray w) => (BitmapArray pass);
+
+  [Sync]
   EchoImageFilter(ImageFilter i) => (ImageFilter pass);
 };