Merge "Detect out of memory in extractAlpha"

    JavaPixelAllocator allocator(env);

    src->extractAlpha(dst, paint, &allocator, &offset);

    // If Skia can't allocate pixels for destination bitmap, it resets

    // it, that is set its pixels buffer to NULL, and zero width and height.

    if (dst->getPixels() == NULL && src->getPixels() != NULL) {

        delete dst;

        doThrowOOME(env, "failed to allocate pixels for alpha");

        return NULL;

    }

    if (offsetXY != 0 && env->GetArrayLength(offsetXY) >= 2) {

        int* array = env->GetIntArrayElements(offsetXY, NULL);

        array[0] = offset.fX;

    return android::AndroidRuntime::registerNativeMethods(env, kClassPathName,

                                gBitmapMethods, SK_ARRAY_COUNT(gBitmapMethods));

}