chromium/src/third_party/blink/web_tests/http/tests/inspector-protocol/storage/quota-withdraw.js

(async function(testRunner) {
  const {page, session, dp} = await testRunner.startBlank(
      `Tests that withdrawing maintains the quota.\n`);
  testRunner.log('Initial storage');
  const origin = "http://localhost";
  const result1 = await dp.Storage.getUsageAndQuota({origin});
  testRunner.log(JSON.stringify(result1.result, ["usage", "quota", "overrideActive"], 2));

  testRunner.log('Applying overrides from two sessions');
  await dp.Storage.overrideQuotaForOrigin({origin, quotaSize: 10000 });

  const dp2 = (await page.createSession()).protocol;
  await dp2.Storage.overrideQuotaForOrigin({origin, quotaSize: 9000 });

  const dp3 = (await page.createSession()).protocol;
  const result2 = await dp3.Storage.getUsageAndQuota({origin});
  testRunner.log(JSON.stringify(result2.result, ["usage", "quota", "overrideActive"], 2));

  testRunner.log('Disconnecting one session');
  session.disconnect();

  const result3 = await dp3.Storage.getUsageAndQuota({origin});
  testRunner.log(JSON.stringify(result3.result, ["usage", "quota", "overrideActive"], 2));


  testRunner.completeTest();
})