Stop using builtinHelper.cache

And start just creating assets to hand to the VM. Towards https://github.com/LLK/scratch-vm/issues/1577

src/containers/record-modal.jsx

@@ -80,17 +80,19 @@ class RecordModal extends React.Component {
                     sampleCount: clippedSamples.length
                 };
 
-                // Load the encoded .wav into the storage cache and get resulting
-                // md5 from storage
-                const storage = this.props.vm.runtime.storage;
-                const md5 = storage.builtinHelper.cache(
+                // Create an asset from the encoded .wav and get resulting md5
+                const storage = this.props.vm.storage;
+                vmSound.asset = storage.createAsset(
                     storage.AssetType.Sound,
                     storage.DataFormat.WAV,
                     new Uint8Array(wavBuffer),
+                    null,
+                    true // generate md5
                 );
+                vmSound.assetId = vmSound.asset.assetId;
 
                 // update vmSound object with md5 property
-                vmSound.md5 = `${md5}.${vmSound.dataFormat}`;
+                vmSound.md5 = `${vmSound.assetId}.${vmSound.dataFormat}`;
                 // The VM will update the sound name to a fresh name
                 // if the following is already taken
                 vmSound.name = 'recording1';

src/lib/file-uploader.js

@@ -63,17 +63,20 @@ const handleFileUpload = function (fileInput, onload) {
  * which can be used to look up the data in storage
  */
 const cacheAsset = function (storage, fileName, assetType, dataFormat, data) {
-    const md5 = storage.builtinHelper.cache(
+    const asset = storage.createAsset(
         assetType,
         dataFormat,
-        data
+        data,
+        null,
+        true // generate md5
     );
 
     return {
         name: fileName,
         dataFormat: dataFormat,
-        md5: `${md5}.${dataFormat}`,
-        assetId: md5
+        asset: asset,
+        md5: `${asset.assetId}.${dataFormat}`,
+        assetId: asset.assetId
     };
 };
 

src/lib/storage.js

@@ -55,7 +55,7 @@ class Storage extends ScratchStorage {
     }
     cacheDefaultProject () {
         const defaultProjectAssets = defaultProject(this.translator);
-        defaultProjectAssets.forEach(asset => this.cache(
+        defaultProjectAssets.forEach(asset => this.builtinHelper._store(
             this.AssetType[asset.assetType],
             this.DataFormat[asset.dataFormat],
             asset.data,