Fix null pointer error.

remoting/webapp/me2mom/client_screen.js

Index: remoting/webapp/me2mom/client_screen.js
diff --git a/remoting/webapp/me2mom/client_screen.js b/remoting/webapp/me2mom/client_screen.js
index 0090c53c2ef7e3e36cb2acb6ac948e8539f5fb01..cc2dd43d383c94138f364616f889ec89aa632d2f 100644
--- a/remoting/webapp/me2mom/client_screen.js
+++ b/remoting/webapp/me2mom/client_screen.js
@@ -123,7 +123,8 @@ remoting.toggleScaleToFit = function(button) {
 remoting.onResize = function() {
   if (remoting.clientSession)
     remoting.clientSession.onWindowSizeChanged();
-  remoting.toolbar.center();
+  if (remoting.toolbar)

[Sergey Ulanov, 2011/12/09 22:36:04]

Maybe change remoting.Toolbar to add onResize handler to toolbar-container so
that we can keep toolbar-specific logic in one file? I can imagine that in some
cases we may want toolbar to be located in a corner instead of screen edge (e.g.
for touch-based UI) - in such cases this code would have to be changed instead
of just swapping Toolbar implementations.

[Wez, 2011/12/09 22:46:53]

That sounds reasonable; we should also rename
ClientSession.onWindowSizeChanged() to onResize(), to match.  If you'd prefer to
do that in a follow-up CL, though, that's fine by me.

[Jamie, 2011/12/09 23:11:48]

Both good points. Done.

+    remoting.toolbar.center();
 }
 
 /**