Docserver: Fixes for expand/collapse issue and fatnav closing on mouseleave.

chrome/common/extensions/docs/static/js/fatnav.js

Index: chrome/common/extensions/docs/static/js/fatnav.js
diff --git a/chrome/common/extensions/docs/static/js/fatnav.js b/chrome/common/extensions/docs/static/js/fatnav.js
index 011013fd2568afe9d12077c27a2639d70dfe34c4..d70fc58f2b7e901a9f3cb761b50898de319d74c6 100644
--- a/chrome/common/extensions/docs/static/js/fatnav.js
+++ b/chrome/common/extensions/docs/static/js/fatnav.js
@@ -39,19 +39,6 @@ var pillars = document.querySelectorAll('.pillar');
                        this.classList.add('active');
     }
   });
-
-  pillar.addEventListener('mouseleave', function(e) {
-    if (!e.target.classList.contains('pillar') ||
-        e.toElement.classList.contains('expandee')) {
-      return;
-    }
-
-    if (e.toElement != fatNav && !e.toElement.classList.contains('pillar') &&
-        e.toElement != search) {
-      hideActive(fatNav);
-    }
-  });
-
 });
 
 if (isLargerThanPhone) {