Using the same code pattern as the rest of the file:
. throw IllegalStateException if BrowserFrame.sJavaBridge is null in pauseTimers/resumeTimers.
. use (msg.arg1 == 1) to pass the boolean from WebView to WebViewCore as in CLEAR_CACHE
Original author: klobag
Merged from: //branches/cupcake/...
Automated import of CL 143999