WebView should implement typingAttributes methods to work correctly with the Inspecto...

WebView should implement typingAttributes methods to work correctly with the Inspector bar in Mail.
https://bugs.webkit.org/show_bug.cgi?id=76951
<rdar://problem/9325158>

Reviewed by Alexey Proskuryakov.

Source/WebKit/mac:

* WebView/WebHTMLView.mm: Removed typingAttributes implementation.
* WebView/WebView.mm:
(-[WebView typingAttributes]): Added.

Tools:

* TestWebKitAPI/Tests/mac/InspectorBar.mm: Modified to reflect the changes to WebView
and WebHTMLView.
(TestWebKitAPI::TEST):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@105908 268f45cc-cd09-0410-ab3c-d52691b4dbfc