Bug 879782 - POST data is sometimes not displayed in the Network Monitor details pane, r=rcampbell

--HG--
rename : browser/devtools/netmonitor/test/browser_net_post-data.js => browser/devtools/netmonitor/test/browser_net_post-data-01.js
Bug 859055 - Display JSON as plain text when encountering errors when parsing, r=rcampbell