Update remoting_start_host to use new Directory service.

This migrates the start_host tool to access the new Directory API
using gRPC.

Bug: 968326
Change-Id: Iac944cfe1d072b977f0d71feb7ad3e30f168e385
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1636671
Auto-Submit: Lambros Lambrou <lambroslambrou@chromium.org>
Commit-Queue: Joe Downing <joedow@chromium.org>
Reviewed-by: Joe Downing <joedow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#664645}

remoting/host/DEPS

@@ -20,6 +20,7 @@ include_rules = [
   "+services/device/public",
   "+services/device/wake_lock/power_save_blocker",
   "+services/network",
+  "+third_party/grpc",
   "+third_party/jsoncpp",
   "+third_party/skia",
   "+third_party/webrtc",

remoting/host/setup/BUILD.gn

@@ -45,6 +45,7 @@ source_set("common") {
     "//remoting/base:authorization",
     "//remoting/host:common",
     "//remoting/host/native_messaging",
+    "//remoting/proto/remoting/v1:directory_grpc_library",
     "//services/network/public/cpp",
     "//services/network/public/mojom",
   ]

remoting/host/setup/host_starter.cc

@@ -40,12 +40,11 @@ HostStarter::HostStarter(
 HostStarter::~HostStarter() = default;
 
 std::unique_ptr<HostStarter> HostStarter::Create(
-    const std::string& chromoting_hosts_url,
+    const std::string& remoting_server_endpoint,
     scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory) {
   return base::WrapUnique(new HostStarter(
       std::make_unique<gaia::GaiaOAuthClient>(url_loader_factory),
-      std::make_unique<remoting::ServiceClient>(chromoting_hosts_url,
-                                                url_loader_factory),
+      std::make_unique<remoting::ServiceClient>(remoting_server_endpoint),
       remoting::DaemonController::Create()));
 }
 

remoting/host/setup/host_starter.h

@@ -39,7 +39,7 @@ class HostStarter : public gaia::GaiaOAuthClient::Delegate,
 
   // Creates a HostStarter.
   static std::unique_ptr<HostStarter> Create(
-      const std::string& chromoting_hosts_url,
+      const std::string& remoting_server_endpoint,
       scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory);
 
   // Registers a new host with the Chromoting service, and starts it.

remoting/host/setup/service_client.h

@@ -10,10 +10,6 @@
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 
-namespace network {
-class SharedURLLoaderFactory;
-}
-
 // A class that gives access to the Chromoting service.
 namespace remoting {
 
@@ -35,9 +31,8 @@ class ServiceClient {
    protected:
     virtual ~Delegate() {}
   };
-  ServiceClient(
-      const std::string& chromoting_hosts_url,
-      scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory);
+
+  explicit ServiceClient(const std::string& remoting_server_endpoint);
   ~ServiceClient();
 
   // Register a host.

remoting/host/setup/start_host_main.cc

@@ -231,7 +231,7 @@ int StartHostMain(int argc, char** argv) {
 
   // Start the host.
   std::unique_ptr<HostStarter> host_starter(HostStarter::Create(
-      remoting::ServiceUrls::GetInstance()->directory_hosts_url(),
+      remoting::ServiceUrls::GetInstance()->remoting_server_endpoint(),
       url_loader_factory_owner.GetURLLoaderFactory()));
   host_starter->StartHost(host_name, host_pin,
                           /*consent_to_data_collection=*/true, auth_code,