Bug: 4606210
If a WEBKIT_DRAW message came in after the WebView was paused,
it would fail to draw causing it to re-send the WEBKIT_DRAW message
which would lead to an infinite loop until the WebView is resumed.
Fix this by not re-sending the WEBKIT_DRAW message if webview is paused.
Change-Id: I3dd946e4e948cf3fd6af07ba6f7fdac2f967a631