[Page Load Metrics] PageLoadMetrics Mojofication.

chrome/browser/chrome_content_browser_manifest_overlay.json

 {
   "name": "content_browser",
   "display_name": "Chrome",
   "interface_provider_specs": {
     "service_manager:connector": {
       "provides": {
         "renderer": [
           "autofill::mojom::AutofillDriver",
           "autofill::mojom::PasswordManagerDriver",
           "chrome::mojom::NetBenchmarking",
@@ skipping 13 matching lines @@
         "accessibility_autoclick": [ "ash:autoclick" ],
         "ash": [ "ash" ],
         "identity": [ "identity_manager" ],
         "nacl_broker": [ "browser" ],
         "nacl_loader": [ "browser" ],
         "preferences_forwarder": [ "pref_client" ],
         "preferences": [ "pref_client", "pref_control" ],
         "ui": [ "display_controller", "ime_registrar", "window_manager" ]
       }
     },
     "navigation:frame": {

[Bryan McQuade, 2017/04/25 15:41:13]

so i can better understand & review the code, can you explain why we're under
'navigation:frame'? What does that mean & why does page load metrics belong
underneath it?

[Ken Rockot(use gerrit already), 2017/04/25 19:31:46]

These are capabilities exposed to render frames specifically. i.e. there are
interfaces which can be requested by individual frames, and interfaces which can
be requested by the render process without any frame context. navigation:frame
capabilities constitute the former. It's a (IMHO somewhat confusing) detail of
the way we scope capabilities in service manifests today, but this is correct.

We're looking into making this less confusing and subsequently better
documented.

       "provides": {
         "renderer": [
           "autofill::mojom::AutofillDriver",
           "autofill::mojom::PasswordManagerDriver",
           "blink::mojom::InstalledAppProvider",
           "blink::mojom::ShareService",
           "bluetooth::mojom::AdapterFactory",
           "chrome::mojom::OpenSearchDocumentDescriptionHandler",
           "chrome::mojom::PrerenderCanceler",
           "contextual_search::mojom::ContextualSearchJsApiService",
           "device::mojom::UsbChooserService",
           "device::mojom::UsbDeviceManager",
           "dom_distiller::mojom::DistillabilityService",
           "dom_distiller::mojom::DistillerJavaScriptService",
           "extensions::KeepAlive",
           "extensions::mime_handler::MimeHandlerService",
           "media_router::mojom::MediaRouter",
+          "page_load_metrics::mojom::PageLoadMetrics",
           "password_manager::mojom::CredentialManager",
           "translate::mojom::ContentTranslateDriver",
 
           // TODO(beng): These should be moved to a separate capability.
           "mojom::OmniboxPageHandler",
           "mojom::PluginsPageHandler",
           "mojom::SiteEngagementDetailsProvider",
           "mojom::UsbInternalsPageHandler"
         ]
       }
     }
   }
 }