Reland: Build a basic Mojo service framework for device/usb

device/usb/BUILD.gn

Index: device/usb/BUILD.gn
diff --git a/device/usb/BUILD.gn b/device/usb/BUILD.gn
index aa74a10638df3019d48935907bfacfb732442a57..672c4efc7f9d4313e998e9f7e54a169dc858e689 100644
--- a/device/usb/BUILD.gn
+++ b/device/usb/BUILD.gn
@@ -9,6 +9,12 @@ generated_ids = "$target_gen_dir/usb_ids_gen.cc"
 
 source_set("usb") {
   sources = [
+    "device_impl.cc",
+    "device_impl.h",
+    "device_manager_impl.cc",
+    "device_manager_impl.h",
+    "type_converters.cc",
+    "type_converters.h",
     "usb_context.cc",
     "usb_context.h",
     "usb_descriptors.cc",
@@ -39,8 +45,16 @@ source_set("usb") {
     "//base/third_party/dynamic_annotations",
     "//components/device_event_log",
     "//device/core",
+    "//device/usb/public/cpp",
+    "//mojo/environment:chromium",
     "//net",
     "//third_party/libusb",
+    "//third_party/mojo/src/mojo/edk/system",
+    "//third_party/mojo/src/mojo/public/cpp/bindings",
+  ]
+
+  public_deps = [
+    "//device/usb/public/interfaces",
   ]
 
   if (is_linux) {