Fix xdg-* commands

Author: stuartmorgan-g

.ci/scripts/set_default_linux_apps.sh

@@ -4,5 +4,29 @@
 # found in the LICENSE file.
 set -e
 
+# Set up a .desktop file pointing to the CIPD-installed Chrome.
+LOCAL_DESKTOP_FILE_DIR=~/.local/share/applications
+mkdir -p "$LOCAL_DESKTOP_FILE_DIR"
+CIPD_CHROME_DESKTOP_FILE=${LOCAL_DESKTOP_FILE_DIR}/cipd-chrome.desktop
+cat << EOF > "$CIPD_CHROME_DESKTOP_FILE"
+[Desktop Entry]
+Version=1.0
+Name=Google Chrome
+GenericName=Web Browser
+Comment=Access the Internet
+Exec=$CHROME_EXECUTABLE %U
+StartupNotify=true
+Terminal=false
+Icon=google-chrome
+Type=Application
+Categories=Network;WebBrowser;
+MimeType=application/pdf;application/rdf+xml;application/rss+xml;application/xhtml+xml;application/xhtml_xml;application/xml;image/gif;image/jpeg;image/png;image/webp;text/html;text/xml;x-scheme-handler/http;x-scheme-handler/https;x-scheme-handler/file;
+EOF
+
+# Enable xdg-* commands to work correctly.
+export DESKTOP_SESSION=gnome
+
+# Set Chrome as the default handler for http, https, and file, for url_launcher
+# tests that expect handlers for those schemes.
 xdg-mime default google-chrome.desktop inode/directory
 xdg-settings set default-web-browser google-chrome.desktop