Add chrome-prt function to launch Chrome with PRT features (#1156)

- Introduces a new `chrome-prt` function in the `install.sh` script to simplify launching Chrome (Stable/Dev/Canary) with Probabilistic Reveal Token (PRT) features enabled. Includes OS-specific binary detection, error handling, and temporary data directory management.

- Channel selection:
  - You can explicitly choose the channel using one of:
    - `chrome-prt --stable`
    - `chrome-prt --dev`
    - `chrome-prt --canary`
  - If no channel is specified, the command auto-selects the first available in this order: Canary > Dev > Stable.

Author: gagan0123

bin/install.sh

@@ -1128,6 +1128,111 @@ chrome-pat-ps() {
     --enable-privacy-sandbox-ads-apis
 }
 
+# Launch desktop Chrome (Stable/Dev/Canary) with PRT features enabled
+chrome-prt() {
+  local requested_channel=""
+  if [[ \$# -gt 0 ]]; then
+    case "\$1" in
+      --stable) requested_channel="stable"; shift;;
+      --dev) requested_channel="dev"; shift;;
+      --canary) requested_channel="canary"; shift;;
+      --*) echo "Error: Unknown option '\$1'. Use --stable, --dev, or --canary." >&2; return 1;;
+    esac
+  fi
+
+  local os_name
+  os_name=\$(uname -s)
+
+  # Determine available Chrome binaries per OS
+  local chrome_stable=""
+  local chrome_dev=""
+  local chrome_canary=""
+
+  if [[ "\$os_name" == "Darwin" ]]; then
+    chrome_stable="/Applications/Google Chrome.app/Contents/MacOS/Google Chrome"
+    chrome_dev="/Applications/Google Chrome Dev.app/Contents/MacOS/Google Chrome Dev"
+    chrome_canary="/Applications/Google Chrome Canary.app/Contents/MacOS/Google Chrome Canary"
+  elif [[ "\$os_name" == "Linux" ]]; then
+    # Common Linux binary names
+    chrome_stable=\$(command -v google-chrome-stable || command -v google-chrome || true)
+    # Dev builds can be "google-chrome-unstable" or "google-chrome-dev"
+    chrome_dev=\$(command -v google-chrome-unstable || command -v google-chrome-dev || true)
+    chrome_canary=\$(command -v google-chrome-canary || true)
+  else
+    echo "Error: Unsupported OS '\$os_name'." >&2
+    return 1
+  fi
+
+  # Helper to test existence
+  _exists() {
+    if [[ -z "\$1" ]]; then return 1; fi
+    [[ -x "\$1" ]]
+  }
+
+  # Select channel
+  local chrome_binary=""
+  if [[ -n "\$requested_channel" ]]; then
+    case "\$requested_channel" in
+      stable)
+        if _exists "\$chrome_stable"; then chrome_binary="\$chrome_stable"; else echo "Error: Requested Chrome Stable either not installed or not found in the system." >&2; return 1; fi;;
+      dev)
+        if _exists "\$chrome_dev"; then chrome_binary="\$chrome_dev"; else echo "Error: Requested Chrome Dev either not installed or not found in the system." >&2; return 1; fi;;
+      canary)
+        if _exists "\$chrome_canary"; then chrome_binary="\$chrome_canary"; else echo "Error: Requested Chrome Canary either not installed or not found in the system." >&2; return 1; fi;;
+    esac
+  else
+    # Default precedence: Canary > Dev > Stable
+    if _exists "\$chrome_canary"; then
+      chrome_binary="\$chrome_canary"
+    elif _exists "\$chrome_dev"; then
+      chrome_binary="\$chrome_dev"
+    elif _exists "\$chrome_stable"; then
+      chrome_binary="\$chrome_stable"
+    else
+      echo "Error: No suitable Chrome installation found (Stable/Dev/Canary)." >&2
+      return 1
+    fi
+  fi
+
+  # Create a temporary directory for user data
+  local data_dir
+  data_dir=\$(mktemp -d "/tmp/chrome_testing_data_dir.XXXXXXXXXX") || { echo "Error: Failed to create temporary user data directory." >&2; return 1; }
+
+  echo "Launching Chrome..."
+  echo "  Executable: \$chrome_binary"
+  echo "  Data Directory: \$data_dir"
+  if [[ \$# -gt 0 ]]; then
+    echo "  Arguments: \$@"
+  fi
+
+  local common_flags=(
+    --user-data-dir="\$data_dir"
+    --disable-sync
+    --no-default-browser-check
+    --no-first-run
+    --silent-debugger-extension-api
+    --disable-infobars
+    --enable-features="EnableIpPrivacyProxy,MaskedDomainList,EnableProbabilisticRevealTokens:ProbabilisticRevealTokensAddHeaderToProxiedRequests/true/EnableProbabilisticRevealTokensForNonProxiedRequests/true/BypassProbabilisticRevealTokenRegistry/true/ProbabilisticRevealTokenServerPath/%2Fv1%2Ftestissueprts%2F,EnableFingerprintingProtectionFilter,EnableFingerprintingProtectionFilterInIncognito,EnableIpPrivacyProxy:IpPrivacyBsaEnablePrivacyPass/true/IpPrivacyUseProxyChains/true/IpPrivacyEnableIppInDevTools/true"
+    --install-autogenerated-theme='15,157,88'
+  )
+
+  if [[ "\$os_name" == "Darwin" || "\$os_name" == "Linux" ]]; then
+    "\$chrome_binary" "\${common_flags[@]}" "\$@" "https://example.com/?psat_cdp=on" >/dev/null 2>&1 &
+  else
+    echo "Error: Unsupported OS '\$os_name' for chrome-prt." >&2
+    rm -rf "\$data_dir"
+    return 1
+  fi
+
+  local chrome_pid=\$!
+  (
+    while ps -p \$chrome_pid > /dev/null; do sleep 5; done
+    rm -rf "\$data_dir"
+  ) &
+
+  echo "Chrome launched in background (PID: \$chrome_pid)."
+}
+
 EOF
 
   # Make the generated script executable
@@ -1163,6 +1268,7 @@ display_outro() {
   echo -e "${CYAN}chrome-3pcd-ps     ${RESET}: Chrome with 3PCD and PSAT extension"
   echo -e "${CYAN}chrome-pat         ${RESET}: Chrome with Private Advertising Testing"
   echo -e "${CYAN}chrome-pat-ps      ${RESET}: Chrome with Private Advertising Testing and PSAT"
+  echo -e "${CYAN}chrome-prt         ${RESET}: Desktop Chrome with PRT features (use --stable/--dev/--canary)"
 
   print_header "=============================================="
 }