test: add browser agent integration tests (#21151)

.github/workflows/chained_e2e.yml

@@ -264,6 +264,27 @@ jobs:
         run: 'npm run build'
         shell: 'pwsh'
 
+      - name: 'Ensure Chrome is available'
+        shell: 'pwsh'
+        run: |
+          $chromePaths = @(
+            "${env:ProgramFiles}\Google\Chrome\Application\chrome.exe",
+            "${env:ProgramFiles(x86)}\Google\Chrome\Application\chrome.exe"
+          )
+          $chromeExists = $chromePaths | Where-Object { Test-Path $_ } | Select-Object -First 1
+          if (-not $chromeExists) {
+            Write-Host 'Chrome not found, installing via Chocolatey...'
+            choco install googlechrome -y --no-progress --ignore-checksums
+          }
+          $installed = $chromePaths | Where-Object { Test-Path $_ } | Select-Object -First 1
+          if ($installed) {
+            Write-Host "Chrome found at: $installed"
+            & $installed --version
+          } else {
+            Write-Error 'Chrome installation failed'
+            exit 1
+          }
+
       - name: 'Run E2E tests'
         env:
           GEMINI_API_KEY: '${{ secrets.GEMINI_API_KEY }}'