Report kibana protocol (#135202)

* kibana protocol

* oops

* Update loaded_kibana.ts

* Update core_system.ts

src/core/public/core_system.test.ts

@@ -255,6 +255,7 @@ describe('#start()', () => {
       kibana_version: '1.2.3',
       load_started: 456,
       bootstrap_started: 123,
+      protocol: 'http:',
     });
 
     expect(window.performance.clearMarks).toHaveBeenCalledTimes(1);
@@ -278,6 +279,7 @@ describe('#start()', () => {
       memory_js_heap_size_limit: 3,
       memory_js_heap_size_total: 2,
       memory_js_heap_size_used: 1,
+      protocol: 'http:',
     });
   });
 

src/core/public/core_system.ts

@@ -146,6 +146,7 @@ export class CoreSystem {
   private reportKibanaLoadedEvent(analytics: AnalyticsServiceStart) {
     analytics.reportEvent('Loaded Kibana', {
       kibana_version: this.coreContext.env.packageInfo.version,
+      protocol: window.location.protocol,
       ...fetchOptionalMemoryInfo(),
       ...this.getLoadMarksInfo(),
     });
@@ -390,6 +391,12 @@ export class CoreSystem {
             optional: true,
           },
         },
+        protocol: {
+          type: 'keyword',
+          _meta: {
+            description: 'Value from window.location.protocol',
+          },
+        },
       },
     });
   }

test/analytics/tests/instrumented_events/from_the_browser/loaded_kibana.ts

@@ -24,6 +24,8 @@ export default function ({ getService, getPageObjects }: FtrProviderContext) {
       expect(event.event_type).to.eql('Loaded Kibana');
       expect(event.properties).to.have.property('kibana_version');
       expect(event.properties.kibana_version).to.be.a('string');
+      expect(event.properties).to.have.property('protocol');
+      expect(event.properties.protocol).to.be.a('string');
 
       // Kibana Loaded timings
       expect(event.properties).to.have.property('load_started');