GTTF: convert some tests in chrome to use EmbeddedTestServer patch nr 1

chrome/test/data/extensions/hosted_app/manifest.json

Index: chrome/test/data/extensions/hosted_app/manifest.json
diff --git a/chrome/test/data/extensions/hosted_app/manifest.json b/chrome/test/data/extensions/hosted_app/manifest.json
index 804417dc9097e374aecc4b699e979c6af6039723..a249e030881e0fd60daebef657bc0c435fff1544 100644
--- a/chrome/test/data/extensions/hosted_app/manifest.json
+++ b/chrome/test/data/extensions/hosted_app/manifest.json
@@ -5,10 +5,10 @@
   "description": "Trivial hosted app.",
   "app": {
     "urls": [
-      "http://localhost/files/extensions/hosted_app/main.html"
+      "http://localhost/extensions/hosted_app/main.html"
     ],
     "launch": {
-      "web_url": "http://localhost/files/extensions/hosted_app/main.html"
+      "web_url": "http://localhost/extensions/hosted_app/main.html"
     }
   }
 }