mash/chrome: Update manifest for exe:chrome.

chrome/app/mojo/chrome_manifest.json

Index: chrome/app/mojo/chrome_manifest.json
diff --git a/chrome/app/mojo/chrome_manifest.json b/chrome/app/mojo/chrome_manifest.json
index cd488366697f128cb2583722cd29937ff62556ab..d2b1905bc2d28e5e7cbd2aa4bc700a66487ce892 100644
--- a/chrome/app/mojo/chrome_manifest.json
+++ b/chrome/app/mojo/chrome_manifest.json
@@ -3,6 +3,16 @@
   "name": "exe:chrome",
   "display_name": "Chrome",
   "capabilities": {
+    "required": {
+      "mojo:mus": {
+        "interfaces": [
+          "mus::mojom::WindowTreeFactory",

[Ben Goodger (Google), 2016/04/29 17:39:56]

why was requesting "app" insufficient? That you have to list these explicitly
seems like a bug.

[sadrul, 2016/04/29 17:43:28]

This seems to be because mus manifest lists shell:explicit_class as required
(although the requirement is for mojo:shell ... not sure if it's WAI that this
affects exe:chrome too)

+          "mus::mojom::Gpu",
+          "mus::mojom::DisplayManager"
+        ]
+      },
+      "*": { "classes": [ "app" ] }
+    },
     "provided": {
       "mash:launchable": [ "mash::mojom::Launchable" ]
     }