Add URL permission to image loader to use analytics.

ui/file_manager/image_loader/manifest.json

 {
   // chrome-extension://pmfjbimdmchhbnneeidfognadeopoehp
   "key": "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDowC9B4+K6zbl4PnALNyOUgra/MPdD8gZ39Fk/IAJWt03qrN7vz1gd/mmrBg0EEIsyLRmUmfyVEfvcIUOZxFqn4A9D2aaRSvNHy9qkasZMBDEql8Nt2iNZm/kGS7sizidDV6Bc/vyLNiH1gKOXBQ42JIxKjgtrmnhGV2giw2vJGwIDAQAB",
   "name": "Image loader",
   "version": "0.1",
   "description": "Image loader",
   "incognito" : "split",
   "manifest_version": 2,
   "permissions": [
     "chrome://resources/",
     {
       "fileSystem": ["requestFileSystem"]
     },
     "fileManagerPrivate",
+    "https://www.google-analytics.com/",
     "https://www.googledrive.com/",
     "metricsPrivate",
     "storage"
   ],
   "content_security_policy": "default-src 'none'; script-src 'self' blob: filesystem: chrome://resources chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj; style-src 'self' blob: filesystem:; frame-src 'self' blob: filesystem:; img-src 'self' blob: filesystem: data:; media-src 'self' blob: filesystem:; connect-src 'self' blob: filesystem: https://www.googledrive.com",
   "background": {
     "scripts": [
       "chrome://resources/js/assert.js",
       "chrome://resources/js/analytics.js",
       "cache.js",
       "chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj/common/js/file_type.js",
       "chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj/common/js/metrics_base.js",
       "chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj/common/js/metrics.js",
       "chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj/common/js/metrics_events.js",
       "chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj/foreground/js/metadata/image_orientation.js",
       "image_loader.js",
       "piex_loader.js",
       "request.js",
       "scheduler.js",
       // Entry point.
       "background.js"
     ],
     "persistent": false
   },
   "web_accessible_resources": ["image_loader_client.js"]
 }