fix: bypass DOM storage quota (#15596)

spec/chromium-spec.js

@@ -938,6 +938,20 @@ describe('chromium feature', () => {
   })
 
   describe('storage', () => {
+    describe('DOM storage quota override', () => {
+      ['localStorage', 'sessionStorage'].forEach((storageName) => {
+        it(`allows saving at least 50MiB in ${storageName}`, () => {
+          const storage = window[storageName]
+          const testKeyName = '_electronDOMStorageQuotaOverrideTest'
+          // 25 * 2^20 UTF-16 characters will require 50MiB
+          const arraySize = 25 * Math.pow(2, 20)
+          storage[testKeyName] = new Array(arraySize).fill('X').join('')
+          expect(storage[testKeyName]).to.have.lengthOf(arraySize)
+          delete storage[testKeyName]
+        })
+      })
+    })
+
     it('requesting persitent quota works', (done) => {
       navigator.webkitPersistentStorage.requestQuota(1024 * 1024, (grantedBytes) => {
         assert.strictEqual(grantedBytes, 1048576)