Several SyntaxErrors on latest master

[luixxiul]

Describe the issue you encountered:

    ERROR in aboutPages.entry.js from UglifyJs
    SyntaxError: Unexpected token: name (ImmutableComponent) [./js/components/immutableComponent.js:7,6]
    
    ERROR in app.entry.js from UglifyJs
    SyntaxError: Unexpected token: name (ImmutableComponent) [./js/components/immutableComponent.js:7,6]
Child
    Hash: 3a4e7aff50182eeef0d9
    Version: webpack 1.14.0
    Time: 17029ms
                  Asset    Size  Chunks             Chunk Names
        lib.devTools.js  189 kB       0  [emitted]  devTools
    lib.devTools.js.map  241 kB       0  [emitted]  devTools
       [0] multi devTools 28 bytes {0} [built]
        + 9 hidden modules
    
    ERROR in lib.devTools.js from UglifyJs
    SyntaxError: Unexpected token: operator (>) [./js/lib/functional.js:11,33]
Child webtorrent:
    Hash: 96353c6b8a04d69991ef
    Version: webpack 1.14.0
    Time: 27293ms
                                     Asset       Size  Chunks             Chunk Names
      2ad15189f9772058209b9036ebf8bda1.svg    1.34 kB          [emitted]  
      8b116e3ce0b2711f8e2cc78c8b32a7c5.svg  485 bytes          [emitted]  
      196262d2122e55e514d47f9e44b66520.svg  431 bytes          [emitted]  
      674f50d287a8c48dc19ba404d20fe713.eot     166 kB          [emitted]  
      912ec66d7572ff821749319396470bde.svg     444 kB          [emitted]  
      b06871f281fee6b241d60582ae9369b9.ttf     166 kB          [emitted]  
    af7ae505a9eed503f8b8e6982036873e.woff2    77.2 kB          [emitted]  
     fee66e712a8a08eef5805a46892932ad.woff      98 kB          [emitted]  
                   webtorrentPage.entry.js     1.3 MB       0  [emitted]  main
               webtorrentPage.entry.js.map    1.56 MB       0  [emitted]  main
       [0] multi main 28 bytes {0} [built]
        + 313 hidden modules
    
    ERROR in webtorrentPage.entry.js from UglifyJs
    SyntaxError: Unexpected token: operator (>) [./js/lib/classSet.js:9,17]

Expected behavior:

• Platform (Win7, 8, 10? macOS? Linux distro?): macOS

• Brave Version (revision SHA): 567bd73

• Steps to reproduce:

  1. CHANNEL=dev run build-package

• Any related issues:

[bbondy]

These are non fatal but I think it's because we reduced transpiling and uglifyJS doesn't support it. I'll see what we can do. There's an uglifyJS harmony branch we might be able to use.

[jonathansampson]

@bbondy I still see these issues:

[NejcZdovc]

@jonathansampson which command did you use to start this webpack run?

[jonathansampson]

@NejcZdovc npm run watch is all I ran to see the above output. Strangely, running it again, I'm not able to repro... I'll keep close watch to see if it happens again.

[bbondy]

@diracdeltas I think this was working at some point but regressed.

[bsclifton]

I always see these too, but it appears to be a warning (even though it says error). Everything works as expected