[remoting host][mac] Delete host settings file in uninstaller

This CL makes the host uninstaller delete the settings file.

Change-Id: If03663338817dba6b15f15ae4493e6edfce9290d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2640652
Auto-Submit: Yuwei Huang <yuweih@chromium.org>
Reviewed-by: Joe Downing <joedow@chromium.org>
Commit-Queue: Yuwei Huang <yuweih@chromium.org>
Cr-Commit-Position: refs/heads/master@{#845769}

remoting/host/installer/mac/uninstaller/remoting_uninstaller.mm

@@ -154,6 +154,7 @@ NSArray* convertToNSArray(const char** array) {
   [self sudoDelete:remoting::kHostLegacyBinaryPath usingAuth:authRef];
   [self sudoDelete:remoting::kOldHostHelperScriptPath usingAuth:authRef];
   [self sudoDelete:remoting::kHostConfigFilePath usingAuth:authRef];
+  [self sudoDelete:remoting::kHostSettingsFilePath usingAuth:authRef];
   [self sudoDelete:remoting::kLogFilePath usingAuth:authRef];
   [self sudoDelete:remoting::kLogFileConfigPath usingAuth:authRef];
   for (const char* path : remoting::kNativeMessagingManifestPaths) {

remoting/host/mac/constants_mac.h

@@ -17,6 +17,8 @@ extern const char kServiceName[];
 extern const char kHostConfigFileName[];
 extern const char kHostConfigFilePath[];
 
+// File that stores lightweight host settings as key-value pairs. See
+// HostSettings for more info.
 extern const char kHostSettingsFilePath[];
 
 // This helper script is executed as root to enable/disable/configure the host