Expose ClientSession details to Host Extensions

remoting/host/client_session.cc

Index: remoting/host/client_session.cc
diff --git a/remoting/host/client_session.cc b/remoting/host/client_session.cc
index 99c7ed509963a449f2a799cf36e044f4d7cbe00c..d92e0091f148cecb5ea8420d407e720338be5b27 100644
--- a/remoting/host/client_session.cc
+++ b/remoting/host/client_session.cc
@@ -88,7 +88,8 @@ ClientSession::ClientSession(
   connection_->SetEventHandler(this);
 
   // Create a manager for the configured extensions, if any.
-  extension_manager_.reset(new HostExtensionSessionManager(extensions, this));
+  extension_manager_.reset(
+      new HostExtensionSessionManager(extensions, this, this));
 
 #if defined(OS_WIN)
   // LocalInputMonitorWin filters out an echo of the injected input before it
@@ -425,6 +426,12 @@ void ClientSession::SetDisableInputs(bool disable_inputs) {
   disable_clipboard_filter_.set_enabled(!disable_inputs);
 }
 
+uint32_t ClientSession::desktop_session_id() const {
+  DCHECK(CalledOnValidThread());
+  return desktop_environment_ ? desktop_environment_->GetDesktopSessionId()
+                              : UINT32_MAX;
+}
+
 std::unique_ptr<protocol::ClipboardStub> ClientSession::CreateClipboardProxy() {
   DCHECK(CalledOnValidThread());