Fix gcc warning about possible unused variable experienced with Apple gcc 4.2
in an -O3 experiment.
Review URL: http://codereview.chromium.org/173125

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@23861 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/net/socket/client_socket_pool_base.cc b/net/socket/client_socket_pool_base.cc
index 7ceaee5..533d103 100644
--- a/net/socket/client_socket_pool_base.cc
+++ b/net/socket/client_socket_pool_base.cc
@@ -562,7 +562,7 @@
     const std::string& group_name, Group* group) {
   if (may_have_stalled_group_) {
     std::string top_group_name;
-    Group* top_group;
+    Group* top_group = NULL;
     int stalled_group_count = FindTopStalledGroup(&top_group, &top_group_name);
     if (stalled_group_count <= 1)
       may_have_stalled_group_ = false;