CupsProxyService boilerplate

DDoc: go/cups-plugin

This sets up the CupsProxy Chrome Service. This service is a singleton, managed
by the ServiceManager and lives in the browser process. The service is currently
started with the Profile; there will be future work to lazily initiate it on first
printing request. Service implementation (ProxyManager) landing in following CL.

Bug: chromium:945409
Test: Builds succeed + service unused so far. Unittests + tast tests landing in future CLs.

Change-Id: I1257f32dbff8a3bdbd5690651b7ccba9e693eb23
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1547813
Reviewed-by: Lei Zhang <[email protected]>
Reviewed-by: Daniel Cheng <[email protected]>
Reviewed-by: Ken Rockot <[email protected]>
Commit-Queue: Luum Habtemariam <[email protected]>
Cr-Commit-Position: refs/heads/master@{#653723}
diff --git a/chrome/browser/DEPS b/chrome/browser/DEPS
index 0f500e9..8de8b92c 100644
--- a/chrome/browser/DEPS
+++ b/chrome/browser/DEPS
@@ -10,6 +10,7 @@
   "+chrome/notification_helper/notification_helper_constants.h",
   "+chrome/services/app_service/public/mojom",
   "+chrome/services/cups_ipp_parser/public",
+  "+chrome/services/cups_proxy",
   "+chrome/services/diagnosticsd/public",
   "+chrome/services/file_util/public",
   "+chrome/services/media_gallery_util/public",