Replace image_messages.h with Mojo service

content/common/BUILD.gn

Index: content/common/BUILD.gn
diff --git a/content/common/BUILD.gn b/content/common/BUILD.gn
index b73a71b6ebb994d09adaa0999bc2db665ceed936..042c80b311752498c6abd0d7cd1b8a956b207f38 100644
--- a/content/common/BUILD.gn
+++ b/content/common/BUILD.gn
@@ -467,6 +467,8 @@ mojom("mojo_bindings") {
   sources = [
     "application_setup.mojom",
     "geolocation_service.mojom",
+    "image_downloader/image_downloader.mojom",
+    "image_downloader/image_downloader_types.mojom",
     "permission_service.mojom",
     "presentation/presentation_service.mojom",
     "render_frame_setup.mojom",
@@ -474,6 +476,8 @@ mojom("mojo_bindings") {
 
   deps = [
     "//content/public/common:mojo_bindings",
+    "//skia/public/interfaces",
     "//third_party/mojo/src/mojo/public/interfaces/application:application",
+    "//third_party/mojo_services/src/geometry/public/interfaces",
   ]
 }