Fix crash with page actions without icons

chrome/browser/gtk/location_bar_view_gtk.cc

Index: chrome/browser/gtk/location_bar_view_gtk.cc
===================================================================
--- chrome/browser/gtk/location_bar_view_gtk.cc	(revision 29714)
+++ chrome/browser/gtk/location_bar_view_gtk.cc	(working copy)
@@ -409,6 +409,15 @@
   if (profile_->GetExtensionsService())
       page_actions = profile_->GetExtensionsService()->GetPageActions();
 
+  // Page actions can be created without an icon, so make sure we count only
+  // those that have been given an icon.
+  for (size_t i = 0; i < page_actions.size();) {
+    if (page_actions[i]->icon_paths().empty())
+      page_actions.erase(page_actions.begin() + i);
+    else
+      ++i;
+  }
+
   // Initialize on the first call, or re-inialize if more extensions have been
   // loaded or added after startup.
   if (page_actions.size() != page_action_views_.size()) {