Remove GET_NATIVE_VIEW from WebViewCore to reduce JNI.

 Bug 5827817
 Added a nativeClass parameter to all appropriate JNI methods
 and used it instead of GET_NATIVE_VIEW to reduce JNI overhead.

 Webkit Change: I02004fe1

Change-Id: I49c7ecfd598826ffe78067aab393a24860ce10ef
1 file changed