Add command-line permission-checking options to remote_assistance_host

The remoting_me2me_host binary supports 2 command-line options, for
checking Accessibility and Screen Recording permissions on MacOS.
This CL adds the same options to the IT2Me native-messaging host.

Bug: 1013446
Change-Id: I4727e5f58f70580f8f31c551968238a4d49457f0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1914834Reviewed-by: Gary Kacmarcik <garykac@chromium.org>
Commit-Queue: Lambros Lambrou <lambroslambrou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#715162}

remoting/host/it2me/BUILD.gn

@@ -233,6 +233,7 @@ if (!is_chromeos && enable_remoting_host) {
         deps += [
           ":remote_assistance_host_dialog_icon",
           "//remoting/host:remoting_infoplist_strings",
+          "//remoting/host/mac:permission_checking",
           "//remoting/resources:copy_locales",
         ]
         if (icu_use_data_file) {

remoting/host/it2me/it2me_native_messaging_host_main.cc

@@ -26,6 +26,7 @@
 #include "remoting/host/native_messaging/pipe_messaging_channel.h"
 #include "remoting/host/policy_watcher.h"
 #include "remoting/host/resources.h"
+#include "remoting/host/switches.h"
 #include "remoting/host/usage_stats_consent.h"
 
 #if defined(OS_LINUX)
@@ -37,6 +38,7 @@
 
 #if defined(OS_MACOSX)
 #include "base/mac/scoped_nsautorelease_pool.h"
+#include "remoting/host/mac/permission_utils.h"
 #endif  // defined(OS_MACOSX)
 
 #if defined(OS_WIN)
@@ -204,6 +206,16 @@ int It2MeNativeMessagingHostMain(int argc, char** argv) {
   base::SingleThreadTaskExecutor main_task_executor(base::MessagePumpType::UI);
   base::RunLoop run_loop;
 
+#if defined(OS_MACOSX)
+  auto* cmd_line = base::CommandLine::ForCurrentProcess();
+  if (cmd_line->HasSwitch(kCheckAccessibilityPermissionSwitchName)) {
+    return mac::CanInjectInput() ? EXIT_SUCCESS : EXIT_FAILURE;
+  }
+  if (cmd_line->HasSwitch(kCheckScreenRecordingPermissionSwitchName)) {
+    return mac::CanRecordScreen() ? EXIT_SUCCESS : EXIT_FAILURE;
+  }
+#endif
+
   // NetworkChangeNotifier must be initialized after SingleThreadTaskExecutor.
   std::unique_ptr<net::NetworkChangeNotifier> network_change_notifier(
       net::NetworkChangeNotifier::CreateIfNeeded());

remoting/host/remoting_me2me_host.cc

@@ -189,18 +189,6 @@ const char kWindowIdSwitchName[] = "window-id";
 // Command line switch used to send a custom offline reason and exit.
 const char kReportOfflineReasonSwitchName[] = "report-offline-reason";
 
-#if defined(OS_MACOSX)
-
-// Command line switch to check for Accessibility permission.
-const char kCheckAccessibilityPermissionSwitchName[] =
-    "check-accessibility-permission";
-
-// Command line switch to check for Screen Recording permission.
-const char kCheckScreenRecordingPermissionSwitchName[] =
-    "check-screen-recording-permission";
-
-#endif  // defined(OS_MACOSX)
-
 // Maximum time to wait for clean shutdown to occur, before forcing termination
 // of the process.
 const int kShutdownTimeoutSeconds = 15;

remoting/host/switches.cc

@@ -43,6 +43,10 @@ const char kUpgradeTokenSwitchName[] = "upgrade-token";
 
 #if defined(OS_MACOSX)
 const char kCheckPermissionSwitchName[] = "check-permission";
+const char kCheckAccessibilityPermissionSwitchName[] =
+    "check-accessibility-permission";
+const char kCheckScreenRecordingPermissionSwitchName[] =
+    "check-screen-recording-permission";
 #endif  // defined OS_MACOSX
 
 }  // namespace remoting

remoting/host/switches.h

@@ -68,6 +68,12 @@ extern const char kUpgradeTokenSwitchName[];
 // NativeMessagingHost switch to check for required OS permissions and request
 // them if necessary.
 extern const char kCheckPermissionSwitchName[];
+
+// Command line switch to check for Accessibility permission.
+extern const char kCheckAccessibilityPermissionSwitchName[];
+
+// Command line switch to check for Screen Recording permission.
+extern const char kCheckScreenRecordingPermissionSwitchName[];
 #endif  // defined OS_MACOSX
 
 }  // namespace remoting