Mind rejected promises from vAPI.storage API

Related issue:
- https://github.com/uBlockOrigin/uBlock-issues/issues/2604

platform/common/vapi-background.js

@@ -90,7 +90,38 @@ vAPI.app = {
 /******************************************************************************/
 /******************************************************************************/
 
-vAPI.storage = webext.storage.local;
+vAPI.storage = {
+    get(...args) {
+        return webext.storage.local.get(...args).catch(reason => {
+            console.log(reason);
+        });
+    },
+    set(...args) {
+        return webext.storage.local.set(...args).catch(reason => {
+            console.log(reason);
+        });
+    },
+    remove(...args) {
+        return webext.storage.local.remove(...args).catch(reason => {
+            console.log(reason);
+        });
+    },
+    clear(...args) {
+        return webext.storage.local.clear(...args).catch(reason => {
+            console.log(reason);
+        });
+    },
+    QUOTA_BYTES: browser.storage.local.QUOTA_BYTES,
+};
+
+// Not all platforms support getBytesInUse
+if ( webext.storage.local.getBytesInUse instanceof Function ) {
+    vAPI.storage.getBytesInUse = function(...args) {
+        return webext.storage.local.getBytesInUse(...args).catch(reason => {
+            console.log(reason);
+        });
+    };
+}
 
 /******************************************************************************/
 /******************************************************************************/

src/js/cachestorage.js

@@ -63,30 +63,26 @@ const storageLocal = webext.storage.local;
 
 const cacheStorage = {
     name: 'browser.storage.local',
-    get: (...args) => {
+    get(...args) {
         return storageLocal.get(...args).catch(reason => {
             console.log(reason);
         });
     },
-    set: (...args) => {
+    set(...args) {
         return storageLocal.set(...args).catch(reason => {
             console.log(reason);
         });
     },
-    remove: (...args) => {
+    remove(...args) {
         return storageLocal.remove(...args).catch(reason => {
             console.log(reason);
         });
     },
-    clear: (...args) => {
+    clear(...args) {
         return storageLocal.clear(...args).catch(reason => {
             console.log(reason);
         });
     },
-    // Not all platforms support getBytesInUse
-    getBytesInUse: storageLocal.getBytesInUse
-        ? storageLocal.getBytesInUse.bind(storageLocal)
-        : undefined,
     select: function(selectedBackend) {
         let actualBackend = selectedBackend;
         if ( actualBackend === undefined || actualBackend === 'unset' ) {
@@ -113,6 +109,15 @@ const cacheStorage = {
     error: undefined
 };
 
+// Not all platforms support getBytesInUse
+if ( storageLocal.getBytesInUse instanceof Function ) {
+    cacheStorage.getBytesInUse = function(...args) {
+        return storageLocal.getBytesInUse(...args).catch(reason => {
+            console.log(reason);
+        });
+    };
+}
+
 // Reassign API entries to that of indexedDB-based ones
 const selectIDB = async function() {
     let db;