Add support in the network service for different contexts.

content/public/app/mojo/content_renderer_manifest.json

 {
   "name": "content_renderer",
   "display_name": "Content (renderer process)",
   "interface_provider_specs": {
     "service_manager:connector": {
       "provides": {
         "browser": [
           "content::mojom::Child",
           "content::mojom::EmbeddedWorkerInstanceClient",
           "content::mojom::EmbeddedWorkerSetup",
@@ skipping 11 matching lines @@
         "content_browser": [ "memory_instrumentation", "renderer" ],
         "device": [
           "device:battery_monitor",
           "device:generic_sensor",
           "device:power_monitor",
           "device:screen_orientation",
           "device:sensors",
           "device:time_zone_monitor",
           "device:vibration"
         ],
-        "network": [ "url_loader" ],
         "ui": [
           "discardable_memory",
           "gpu_client"
         ]
       }
     },
     "navigation:frame": {
       "provides": {
         "browser": [
           "blink::mojom::AppBannerController",
@@ skipping 26 matching lines @@
     "v8_snapshot_32_data" : [{
       "path": "assets/snapshot_blob_32.bin",
       "platform": "android"
     }],
     "v8_snapshot_64_data" : [{
       "path": "assets/snapshot_blob_64.bin",
       "platform": "android"
     }]
   }
 }