Omnibox UI Experiments: Add vertical margin variations to about:flags

chrome/browser/flag_descriptions.h

Index: chrome/browser/flag_descriptions.h
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index 6c1a45a90ff354146c3c275f8a492b248e9ecaa9..f5100c91f6a00ebf5066276c9f6382d3e7c686a1 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -3340,6 +3340,12 @@ extern const char kOmniboxDisplayTitleForCurrentUrlName[];
 // for current URL.
 extern const char kOmniboxDisplayTitleForCurrentUrlDescription[];
 
+// Name of the Omnibox UI vertical margin flag.
+extern const char kOmniboxUIVerticalMarginName[];
+
+// Description of the Omnibox UI vertical margin flag.
+extern const char kOmniboxUIVerticalMarginDescription[];
+
 // Name & description for the heap profiling flag.
 extern const char kEnableHeapProfilingName[];
 extern const char kEnableHeapProfilingDescription[];