Expose the chrome.windows.* API to platform apps.

chrome/test/data/extensions/platform_apps/windows_api/manifest.json

Index: chrome/test/data/extensions/platform_apps/windows_api/manifest.json
diff --git a/chrome/test/data/extensions/platform_apps/windows_api/manifest.json b/chrome/test/data/extensions/platform_apps/windows_api/manifest.json
new file mode 100644
index 0000000000000000000000000000000000000000..261ef869fd643e785a7ab83efced7ff3adce5f9b
--- /dev/null
+++ b/chrome/test/data/extensions/platform_apps/windows_api/manifest.json
@@ -0,0 +1,15 @@
+{
+  "name": "Platform App Test: Windows API",
+  "platform_app": true,
+  "version": "1",
+  "manifest_version": 2,
+  "permissions": ["windows"],
+  "app": {
+    "launch": {
+      "local_path": "main.html",
+      "container": "shell",
+     "width": 250,
+      "height": 250
+    }
+  }
+}