Linux clipboard support for Chromoting host.

Submission for readability review.

Original CLs:
http://codereview.chromium.org/10909133
http://codereview.chromium.org/11035049


Review URL: https://chromiumcodereview.appspot.com/11340028

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@168428 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/remoting/host/clipboard_linux.cc b/remoting/host/clipboard_linux.cc
index 1f74689..30b53916 100644
--- a/remoting/host/clipboard_linux.cc
+++ b/remoting/host/clipboard_linux.cc
@@ -40,9 +40,14 @@
 
   scoped_ptr<protocol::ClipboardStub> client_clipboard_;
 
+  // Underlying X11 clipboard implementation.
   XServerClipboard x_server_clipboard_;
+
+  // Connection to the X server, used by |x_server_clipboard_|. This is created
+  // and owned by this class.
   Display* display_;
 
+  // Watcher used to handle X11 events from |display_|.
   MessageLoopForIO::FileDescriptorWatcher x_connection_watcher_;
 
   DISALLOW_COPY_AND_ASSIGN(ClipboardLinux);