title: unexpected char. error when uploading Chrome extension
body: <p>I have developed a Chrome extension which works perfectly fine when I load it as an unpacked extension in Chrome. However, when I attempt to upload the zip to the Chrome Web Store, I receive the following manifest.json error:</p>
  
  <p><strong>An error occurred: Failed to process your item.
  manifest.json:8:4: unexpected char.</strong></p>
  
  <p>I have already removed all comments from the JSON file. I even tested my JSON at <a href="http://jsonlint.com" rel="noreferrer">http://jsonlint.com</a> and it came back valid. Does anyone have any clue as to what the issue could be?</p>
  
  <p>Here is my manifest.json:</p>
  
  <pre><code>{
    "manifest_version": 2,
    "name": "My Extension",
    "version": "0.0.0.1",
    "description": "Description goes here",
    "content_scripts": [
        {
            "matches": ["https://example.com"],
            "css": ["css/style.css"],
            "js": [
                "lib/jquery-2.1.4.min.js",
                "scripts/main.js"
            ],
            "run_at": "document_idle"
        }
    ],
    "icons": {
        "16": "icons/16.png",
        "48": "icons/48.png",
        "128": "icons/128.png"
    }
  }
  </code></pre>