Add a flag for fill on account select without highlighting

components/autofill/core/common/autofill_switches.cc

Index: components/autofill/core/common/autofill_switches.cc
diff --git a/components/autofill/core/common/autofill_switches.cc b/components/autofill/core/common/autofill_switches.cc
index e291a6270daaff18551714d870463955d627f043..01cc7836fc27950520ece36a725e9c45772a6ba5 100644
--- a/components/autofill/core/common/autofill_switches.cc
+++ b/components/autofill/core/common/autofill_switches.cc
@@ -27,9 +27,15 @@ const char kDisableSingleClickAutofill[]    = "disable-single-click-autofill";
 const char kEnableCreditCardScan[]          = "enable-credit-card-scan";
 
 // Enables the experiment for the password manager to only fill on account
-// selection, rather than autofilling on page load.
+// selection, rather than autofilling on page load, with highlighting of fields.
 const char kEnableFillOnAccountSelect[]     = "enable-fill-on-account-select";
 
+// Enables the experiment for the password manager to only fill on account
+// selection, rather than autofilling on page load, with no highlighting of
+// fields.
+const char kEnableFillOnAccountSelectNoHighlighting[] =
+    "enable-fill-on-account-select-no-highlighting";
+
 // Enables password generation when we detect that the user is going through
 // account creation.
 const char kEnablePasswordGeneration[]      = "enable-password-generation";