Turn the utility process image decoder into a Mojo service.

skia/public/interfaces/BUILD.gn

Index: skia/public/interfaces/BUILD.gn
diff --git a/net/interfaces/BUILD.gn b/skia/public/interfaces/BUILD.gn
similarity index 79%
copy from net/interfaces/BUILD.gn
copy to skia/public/interfaces/BUILD.gn
index 03a07785251e4d2fa222319e0a4cab1d0c4c5f9a..ea57c5032c69bab5af4ccc9dbedb3dea703ba328 100644
--- a/net/interfaces/BUILD.gn
+++ b/skia/public/interfaces/BUILD.gn
@@ -6,7 +6,6 @@ import("//third_party/mojo/src/mojo/public/tools/bindings/mojom.gni")
 
 mojom("interfaces") {
   sources = [
-    "host_resolver_service.mojom",
-    "proxy_resolver_service.mojom",
+    "bitmap.mojom",
   ]
 }