Bug 190437 - showdependencytree.cgi and showdependencygraph should use switch_to_shadow_db

r=bbaetz
a=justdave

webtools/bugzilla/showdependencygraph.cgi

@@ -31,6 +31,10 @@ ConnectToDatabase();
 
 quietly_check_login();
 
+# Connect to the shadow database if this installation is using one to improve
+# performance.
+Bugzilla->instance->switch_to_shadow_db();
+
 use vars qw($template $vars $userid);
 
 my %seen;

webtools/bugzilla/showdependencytree.cgi

@@ -37,6 +37,10 @@ ConnectToDatabase();
 
 quietly_check_login();
 
+# Connect to the shadow database if this installation is using one to improve
+# performance.
+Bugzilla->instance->switch_to_shadow_db();
+
 # More warning suppression silliness.
 $::userid = $::userid;