Add a UI flag for updated omnibox connection security indicators

This CL adds a new flag to chrome://flags called
omnibox-updated-connection-security-indicators. If enabled, Chrome
will use updated connection security indicators for https:// URLs.

Bug: 1204293
Change-Id: I08b82a9f8423887d4ddc0cd8e129e57bb919ea8e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3018525
Commit-Queue: Mustafa Emre Acer <[email protected]>
Reviewed-by: Emily Stark <[email protected]>
Cr-Commit-Position: refs/heads/master@{#901599}
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index a133c1a..eda5a59 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -1891,6 +1891,11 @@
     "Changes the maximum number of autocomplete matches displayed in the "
     "Omnibox UI.";
 
+const char kOmniboxUpdatedConnectionSecurityIndicatorsName[] =
+    "Omnibox Updated connection security indicators";
+const char kOmniboxUpdatedConnectionSecurityIndicatorsDescription[] =
+    "Use new connection security indicators for https pages in the omnibox.";
+
 const char kOmniboxMaxURLMatchesName[] = "Omnibox Max URL Matches";
 const char kOmniboxMaxURLMatchesDescription[] =
     "The maximum number of URL matches to show, unless there are no "