Remove unused "type" field from DictionaryPopupInfo
https://bugs.webkit.org/show_bug.cgi?id=116011

Reviewed by Darin Adler.

It is unused, and furthermore, PDFPlugin sets it incorrectly anyway.

* Shared/DictionaryPopupInfo.cpp:
(WebKit::DictionaryPopupInfo::encode):
(WebKit::DictionaryPopupInfo::decode):
* Shared/DictionaryPopupInfo.h:
* WebProcess/Plugins/PDF/PDFPlugin.mm:
(WebKit::PDFPlugin::showDefinitionForAttributedString):
* WebProcess/WebCoreSupport/mac/WebContextMenuClientMac.mm:
(WebKit::WebContextMenuClient::lookUpInDictionary):
* WebProcess/WebPage/WebPage.h:
* WebProcess/WebPage/mac/WebPageMac.mm:
(WebKit::WebPage::performDictionaryLookupAtLocation):
(WebKit::WebPage::performDictionaryLookupForSelection):
(WebKit::WebPage::performDictionaryLookupForRange):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150064 268f45cc-cd09-0410-ab3c-d52691b4dbfc