Add removeExtra()

Reviewed By: bestander

Differential Revision: D14386282

fbshipit-source-id: 045dd0f12cc462da694d20da52f3a591b538dc57

Libraries/Utilities/__tests__/PerformanceLogger-test.js

@@ -70,6 +70,16 @@ describe('PerformanceLogger', () => {
     });
   });
 
+  it('removes an extra', () => {
+    let perfLogger = createPerformanceLogger();
+    perfLogger.setExtra(EXTRA_KEY, EXTRA_VALUE);
+    expect(perfLogger.getExtras()).toEqual({
+      [EXTRA_KEY]: EXTRA_VALUE,
+    });
+    expect(perfLogger.removeExtra(EXTRA_KEY)).toEqual(EXTRA_VALUE);
+    expect(perfLogger.getExtras()).toEqual({});
+  });
+
   it('logs a point', () => {
     let perfLogger = createPerformanceLogger();
     perfLogger.markPoint(POINT, POINT_TIMESTAMP);

Libraries/Utilities/createPerformanceLogger.js

@@ -38,6 +38,7 @@ export type IPerformanceLogger = {
   addTimespans(Array<number>, Array<string>): void,
   setExtra(string, any): void,
   getExtras(): {[key: string]: any},
+  removeExtra(string): ?any,
   logExtras(): void,
   markPoint(string, number | void): void,
   getPoints(): {[key: string]: number},
@@ -217,6 +218,12 @@ function createPerformanceLogger(): IPerformanceLogger {
       return this._extras;
     },
 
+    removeExtra(key: string): ?any {
+      const value = this._extras[key];
+      delete this._extras[key];
+      return value;
+    },
+
     logExtras() {
       infoLog(this._extras);
     },