DevTools: Use real focus in TreeOutline

third_party/WebKit/Source/devtools/front_end/security/sidebar.css

Index: third_party/WebKit/Source/devtools/front_end/security/sidebar.css
diff --git a/third_party/WebKit/Source/devtools/front_end/security/sidebar.css b/third_party/WebKit/Source/devtools/front_end/security/sidebar.css
index 1383c482b3e74b6d6dc3100c0631a3e3423e13c4..85dc0a895435ebab577a2ab3325202eae3c43454 100644
--- a/third_party/WebKit/Source/devtools/front_end/security/sidebar.css
+++ b/third_party/WebKit/Source/devtools/front_end/security/sidebar.css
@@ -18,8 +18,8 @@
     white-space: nowrap;
 }
 
-.tree-outline:focus li.selected .lock-icon,
-.tree-outline:focus .security-sidebar-tree-item.selected .icon
+.tree-outline li.selected:focus .lock-icon,
+.tree-outline .security-sidebar-tree-item.selected:focus .icon
 {
     background-color: white;
 }