c93fb656dc
1. Added a mechanism to select the cursor ring content if accessibility is enabled - This is achieved by sending an event to the WebCore thread (if accessibility is enabled) to select the content of the cursor when the latter moves. Added code in WebViewCore to select the given node and notify the UI thread for the selection markup which is delivered of the accessibility injector which manages sending accessibility events. This is relevant for adding accessibility to WebView if JavaScript is not enabled. (If JS is enabled we inject a screenreader written in JS). 2. Fixed the event delegation to the accessibility injector since it should be able to consume key events of interest and perform some action which leads to sending appropriate accessibility event. In the previous implementation it was possible that the injector consumes the event but the latter was bubbled up. 3. Added function to scroll the selection into view while moving it around based on user commands. Note: This is a part of two project commmit. Change-Id: Ibb81d0468726efbe3bf6e3add1b19c69e3206638