Moved code that set initial value of text control via the editor from CreateAnonymousContent() to a new method called SetInitialValue(). SetInitialValue() is now called during the frame's first reflow. Added mUseEditor to indicate when it is safe to use the editor to get and set values. r=mjudge@netscape.com git-svn-id: svn://10.0.0.236/trunk@78409 18797224-902f-48f8-a5cc-f745e15eee43