Enable the save card bubble on Mac without a flag.

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 b0078e6c117f36e20e38f3e2b6d994a2d10b7bd0..1fa15369cf374af150b565ce68bd079ca3d287a6 100644
--- a/components/autofill/core/common/autofill_switches.cc
+++ b/components/autofill/core/common/autofill_switches.cc
@@ -33,10 +33,6 @@ const char kDisableOfferUploadCreditCards[] =
 // account creation.
 const char kDisablePasswordGeneration[]     = "disable-password-generation";
 
-// Disables showing bubble instead of infobar for save credit card prompt.
-const char kDisableSaveCardBubble[] =
-    "disable-autofill-save-card-bubble";
-
 // The "disable" flag for kEnableSingleClickAutofill.
 const char kDisableSingleClickAutofill[]    = "disable-single-click-autofill";
 
@@ -69,10 +65,6 @@ const char kEnableOfferUploadCreditCards[] = "enable-offer-upload-credit-cards";
 // account creation.
 const char kEnablePasswordGeneration[]      = "enable-password-generation";
 
-// Enables showing bubble instead of infobar for save credit card prompt.
-const char kEnableSaveCardBubble[] =
-    "enable-autofill-save-card-bubble";
-
 // Enables/disables suggestions without typing anything (on first click).
 const char kEnableSingleClickAutofill[]     = "enable-single-click-autofill";