Fix bump-scroll on Windows.

remoting/webapp/client_session.js

Index: remoting/webapp/client_session.js
diff --git a/remoting/webapp/client_session.js b/remoting/webapp/client_session.js
index 98a5652b05d0e078d5ccb5e20e2c7c4f2de69eb2..fbd38d30fe7914454e9b8eb1ad926f558a789771 100644
--- a/remoting/webapp/client_session.js
+++ b/remoting/webapp/client_session.js
@@ -639,7 +639,10 @@ remoting.ClientSession.prototype.toggleFullScreen_ = function() {
     this.enableBumpScroll_(false);
   } else {
     document.body.webkitRequestFullScreen(Element.ALLOW_KEYBOARD_INPUT);
-    this.enableBumpScroll_(true);
+    // Don't enable bump scrolling immediately because it can result in
+    // onMouseMove firing before the webkitIsFullScreen property can be
+    // read safely (crbug.com/132180).
+    window.setTimeout(this.enableBumpScroll_.bind(this, true), 0);
   }
 };