Remove the limit of number of commands per extension, but keep the limit of 4 shortcuts per extensi…

chrome/common/extensions/docs/templates/intros/commands.html

Index: chrome/common/extensions/docs/templates/intros/commands.html
===================================================================
--- chrome/common/extensions/docs/templates/intros/commands.html	(revision 190361)
+++ chrome/common/extensions/docs/templates/intros/commands.html	(working copy)
@@ -33,6 +33,10 @@
 AltGr key. Also note that on Mac 'Ctrl' is automatically converted to 'Command'.
 If you want 'Ctrl' instead, please specify 'MacCtrl'.</p>
 
+<p>An extension can have many commands but only 4 suggested keys can be
+specified. The user can manually add more shortcuts from the chrome://extensions
+page.</p>
+
 <pre>{
   "name": "My extension",
   ...