Reviewed by David Levin.

        Handle the touch icon.
        https://bugs.webkit.org/show_bug.cgi?id=60247

        Added WebIconURL for the corresponding IconURL.
        Added a parameter to favIconURL() to specify the type of icon need to
        return.

        * WebKit.gyp:
        * features.gypi:
        * public/WebFrame.h:
        * public/WebFrameClient.h:
        (WebKit::WebFrameClient::didChangeIcons):
        * public/WebIconURL.h: Added.
        (WebKit::WebIconURL::WebIconURL):
        * src/AssertMatchingEnums.cpp:
        * src/FrameLoaderClientImpl.cpp:
        (WebKit::FrameLoaderClientImpl::dispatchDidChangeIcons):
        * src/WebFrameImpl.cpp:
        (WebKit::WebFrameImpl::favIconURL):
        * src/WebFrameImpl.h:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@86091 268f45cc-cd09-0410-ab3c-d52691b4dbfc