Make browser process a singleton service

chrome/browser/chrome_content_browser_manifest_overlay.json

Index: chrome/browser/chrome_content_browser_manifest_overlay.json
diff --git a/chrome/browser/chrome_content_browser_manifest_overlay.json b/chrome/browser/chrome_content_browser_manifest_overlay.json
index a55ea5672f4b27c5548344e91eeec1b944a891e1..7444d5b35cdf9588b72239da790aecb22820b31c 100644
--- a/chrome/browser/chrome_content_browser_manifest_overlay.json
+++ b/chrome/browser/chrome_content_browser_manifest_overlay.json
@@ -19,29 +19,7 @@
         "gpu": [
           "metrics::mojom::CallStackProfileCollector"
         ],
-        "ash": [
-          // Under classic ash the browser provides some of the ash interfaces
-          // to itself.
-          "app_list::mojom::AppList",
-          "app_list::mojom::AppListPresenter",
-          "ash::mojom::AcceleratorController",
-          "ash::mojom::CastConfig",
-          "ash::mojom::LocaleNotificationController",
-          "ash::mojom::MediaController",
-          "ash::mojom::NewWindowController",
-          "ash::mojom::SessionController",
-          "ash::mojom::ShelfController",
-          "ash::mojom::ShutdownController",
-          "ash::mojom::SystemTray",
-          "ash::mojom::TouchViewManager",
-          "ash::mojom::WallpaperController",
-          "ash::mojom::VpnList",
-          "keyboard::mojom::Keyboard"
-        ],
-        "ime:ime_driver": [],
-        "mash:launchable": [
-          "mash::mojom::Launchable"
-        ]
+        "ime:ime_driver": []
       },
       "requires": {
         "accessibility_autoclick": [ "ash:autoclick" ],