How to compile qtwebkit plugins?

QtWebkit-plugins is a library that provides features to the QWebView, eg SpellCheck and Notification Web API .

Read about:

• 
  

  SpellCheck

  
  


• 
  

  Notification Web API

  
  

I tried to compile the code in Windows, but my QWebView not working as expected, in other words, SpellCheck and Notification Web API not working. It's like I've been not-using QtWebkit-plugins. Which can be?

In the documentation that says to compile I have to run:

$ qmake
$ make && make install

Read more in QtWebkit-plugins repository

But I read on another issue (here in StackOverflow) that when I use the MingW I do not need to use qmake, so I tried to do the step-by-step to compile:

• I compiled hunspell


• Copied hunspell for C:\Qt5.4.0\5.4\mingw491_32\bin and C:\Qt5.4.0\5.4\mingw491_32\lib


• Compiled the qtwebkit-plugins.pro project (clicked in Build on QtCreator)


• The Build generates libqtwebkitpluginsd.a and qtwebkitplugins.dll


• Copied libqtwebkitpluginsd.a for C:\Qt5.4.0\5.4\mingw491_32\lib


• Copied qtwebkitplugins.dll for C:\Qt5.4.0\5.4\mingw491_32\plugins\webkit and C:\Qt5.4.0\5.4\mingw491_32\bin

After that I compiled another simple project that uses QWebView then tested the SpellCheck in a <textarea spellcheck="true"></textarea> and did not work.

I tested the Notification Web API and also did not work.

Note: When running my project using QT_DEBUG_PLUGINS=1 and use Notification Web API the application output tab (in QtCreator) returns:

Found metadata in lib C:/Qt5.4.0/5.4/mingw491_32/plugins/webkit/qtwebkitplugins.dll, metadata=
{
    "IID": "org.qtwebkit.QtWebKit.QtWebKitPlugin",
    "MetaData": {
    },
    "className": "QtWebKitPlugin",
    "debug": false,
    "version": 328704
}


loaded library "C:/Qt5.4.0/5.4/mingw491_32/plugins/webkit/qtwebkitplugins.dll"
QLibraryPrivate::unload succeeded on "C:/Qt5.4.0/5.4/mingw491_32/plugins/webkit/qtwebkitplugins.dll" 
QSystemTrayIcon::setVisible: No Icon set

It seems to me that the dll is loaded, it just is not working.

How do my projects work these features?