* gnu/java/nio/channels/FileChannelImpl.java: New class, renamed
from java/nio/channels. Don't depend on FileDescriptor.
(in, out, err): New static fields.
(mode): New field.
(SET, CUR, READ, WRITE, APPEND, EXCL, SYNC, DSYNC): Moved constants
from FileDescriptor.
(by): Removed MappedByteBuffer field.
(map): New working implementation.
* gnu/java/nio/channels/natFileChannelPosix.cc: New file, though
some code "ported" from natFileDescriptoPosix.cc.
* gnu/java/nio/channels/natFileChannelEcos.cc: Likewise.
* gnu/java/nio/channels/natFileChannelWin32.cc Likewise.
From-SVN: r78659
