Add Source Map support to e2e deltas in chrome debugger

Reviewed By: jeanlauliac

Differential Revision: D5917380

fbshipit-source-id: 31391bc03c420b8e7af5c840fbea2fb0dd5f7bbc

local-cli/server/util/debugger-ui/deltaUrlToBlobUrl.js

@@ -49,7 +49,11 @@
       URL.revokeObjectURL(cachedBundle.url);
     }
 
-    const blobContent = deltaPatcher.getAllModules();
+    // To make Source Maps work correctly, we need to add a newline between
+    // modules.
+    const blobContent = deltaPatcher
+      .getAllModules()
+      .map(module => module + '\n');
 
     // Build the blob with the whole JS bundle.
     const blob = new Blob(blobContent, {