DevTools: add entry points for command menu

third_party/WebKit/Source/devtools/front_end/ui/tabbedPane.css

Index: third_party/WebKit/Source/devtools/front_end/ui/tabbedPane.css
diff --git a/third_party/WebKit/Source/devtools/front_end/ui/tabbedPane.css b/third_party/WebKit/Source/devtools/front_end/ui/tabbedPane.css
index b0f12569b0e45b9bfb1bdb22ba11547eb11aff99..76015691b0da2e4e5899343cb0a40b64df8f5278 100644
--- a/third_party/WebKit/Source/devtools/front_end/ui/tabbedPane.css
+++ b/third_party/WebKit/Source/devtools/front_end/ui/tabbedPane.css
@@ -45,13 +45,6 @@
     background-color: lightgray;
 }
 
-.tabbed-pane-placeholder {
-    font-size: 14px;
-    text-align: center;
-    margin-top: 20px;
-    text-shadow: rgba(255, 255, 255, 0.75) 0 1px 0;
-}
-
 .tabbed-pane-header {
     display: flex;
     flex: 0 0 27px;