cros: Add a header for gaia auth requests.

chrome/browser/resources/gaia_auth/manifest.json

Index: chrome/browser/resources/gaia_auth/manifest.json
diff --git a/chrome/browser/resources/gaia_auth/manifest.json b/chrome/browser/resources/gaia_auth/manifest.json
index 0606736a580c9d77c212cf7ad3e786f5b4aba655..2e4945e7a4f0c03278613c00121faf249f3b61d0 100644
--- a/chrome/browser/resources/gaia_auth/manifest.json
+++ b/chrome/browser/resources/gaia_auth/manifest.json
@@ -17,12 +17,15 @@
     "success.js",
     "util.js"
   ],
-  // cookies for getting hash passed back from GAIA on login success
-  // tabs for calling current webui's login. This might not be needed once
-  //     we have extension API
+  "background": {
+    "scripts": ["background.js"]

[asargent_no_longer_on_chrome, 2013/04/12 17:46:07]

Can you make this use event pages (aka "lazy background pages" aka
"persistent":false)? 

https://developer.chrome.com/extensions/event_pages.html

[xiyuan, 2013/04/12 18:05:00]

webRequest is not supported in event pages yet.

+  },
+  // background, webRequest and host rules to set additional http header for
+  //     request sent from sub frame.
   "permissions": [
-      "cookies",
-      "tabs",
-      "chrome://oobe/"
+    "background",
+    "webRequest",
+    "webRequestBlocking",
+    "<all_urls>"

[zel, 2013/04/11 20:43:21]

Can't we scope this down from <all_urls>? This seems too permissive to me.

   ]
 }