[omnibox] Added 'OmniboxTailSuggestions' flag

tools/metrics/histograms/enums.xml

Index: tools/metrics/histograms/enums.xml
diff --git a/tools/metrics/histograms/enums.xml b/tools/metrics/histograms/enums.xml
index d79e26a786af2e484ae09e48987d27754a5f7420..d7160a62a91bbd06a6c802a823f0912a8b30b006 100644
--- a/tools/metrics/histograms/enums.xml
+++ b/tools/metrics/histograms/enums.xml
@@ -21582,6 +21582,7 @@ uploading your change for review.  These are checked by presubmit scripts.
       label="CrossOriginMediaPlaybackRequiresUserGesture:enabled"/>
   <int value="-2099035488" label="enable-data-reduction-proxy-bypass-warning"/>
   <int value="-2098610409" label="disable-lcd-text"/>
+  <int value="-2098243118" label="OmniboxTailSuggestions:disabled"/>
   <int value="-2097515669" label="disable-cast"/>
   <int value="-2091404586" label="TabStripKeyboardFocus:enabled"/>
   <int value="-2090484194" label="ContextualSearchUrlActions:disabled"/>
@@ -22316,6 +22317,7 @@ from previous Chrome versions.
   <int value="504994663" label="GenericSensor:disabled"/>
   <int value="506680761" label="WebNFC:disabled"/>
   <int value="510814146" label="OfflineBookmarks:enabled"/>
+  <int value="535131384" label="OmniboxTailSuggestions:enabled"/>
   <int value="535976218" label="enable-plugin-power-saver"/>
   <int value="538468149" label="OfflinePagesCT:enabled"/>
   <int value="546520086" label="enable-data-reduction-proxy-savings-promo"/>