[ios] Creates Feature Flag for Save Card Messages.

Bug: 1014652
Change-Id: Ic902b03346ba9eb96fd77e0f449dfd951036bae2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1866980
Commit-Queue: Sergio Collazos <sczs@chromium.org>
Reviewed-by: Peter Lee <pkl@chromium.org>
Cr-Commit-Position: refs/heads/master@{#707417}

ios/chrome/browser/flags/about_flags.mm

@@ -560,6 +560,10 @@ const flags_ui::FeatureEntry kFeatureEntries[] = {
      flag_descriptions::kDisableAnimationOnLowBatteryName,
      flag_descriptions::kDisableAnimationOnLowBatteryDescription,
      flags_ui::kOsIos, FEATURE_VALUE_TYPE(kDisableAnimationOnLowBattery)},
+    {"messages-save-card-infobar",
+     flag_descriptions::kSaveCardInfobarMessagesUIName,
+     flag_descriptions::kSaveCardInfobarMessagesUIDescription, flags_ui::kOsIos,
+     FEATURE_VALUE_TYPE(kSaveCardInfobarMessagesUI)},
 };
 
 // Add all switches from experimental flags to |command_line|.

ios/chrome/browser/flags/ios_chrome_flag_descriptions.cc

@@ -292,6 +292,10 @@ const char kPasswordLeakDetectionName[] = "Password Leak Detection";
 const char kPasswordLeakDetectionDescription[] =
     "Enables the detection of leaked passwords.";
 
+const char kSaveCardInfobarMessagesUIName[] = "Save Card Infobar Messages UI";
+const char kSaveCardInfobarMessagesUIDescription[] =
+    "When enabled, Save Card Infobar uses the new Messages UI.";
+
 const char kSearchIconToggleName[] = "Change the icon for the search button";
 const char kSearchIconToggleDescription[] =
     "Different icons for the search button.";

ios/chrome/browser/flags/ios_chrome_flag_descriptions.h

@@ -249,6 +249,11 @@ extern const char kOptionalArticleThumbnailDescription[];
 extern const char kPasswordLeakDetectionName[];
 extern const char kPasswordLeakDetectionDescription[];
 
+// Title and description for the flag that enables Messages UI on
+// SaveCard Infobars.
+extern const char kSaveCardInfobarMessagesUIName[];
+extern const char kSaveCardInfobarMessagesUIDescription[];
+
 // Title and description for the flag to toggle the flag of the search button.
 extern const char kSearchIconToggleName[];
 extern const char kSearchIconToggleDescription[];

ios/chrome/browser/ui/infobars/infobar_feature.h

@@ -13,15 +13,24 @@
 extern const base::Feature kInfobarUIReboot;
 
 // Feature to choose whether Confirm Infobars use the new Messages UI or the
-// legacy one. In order for it to work kInfobarUIReboot also needs to be
+// legacy one. Also, in order for it to work kInfobarUIReboot needs to be
 // enabled.
 // Use IsConfirmInfobarMessagesUIEnabled() instead of this constant directly.
 extern const base::Feature kConfirmInfobarMessagesUI;
 
+// Feature to choose whether Save Card Infobar uses the new Messages UI or the
+// legacy one. Also, in order for it to work kInfobarUIReboot needs to be
+// enabled.
+// Use IsSaveCardInfobarMessagesUIEnabled() instead of this constant directly.
+extern const base::Feature kSaveCardInfobarMessagesUI;
+
 // Whether the Messages Infobar UI is enabled.
 bool IsInfobarUIRebootEnabled();
 
 // Whether the Confirm Infobar Messages UI is enabled.
 bool IsConfirmInfobarMessagesUIEnabled();
 
+// Whether the SaveCard Infobar Messages UI is enabled.
+bool IsSaveCardInfobarMessagesUIEnabled();
+
 #endif  // IOS_CHROME_BROWSER_UI_INFOBARS_INFOBAR_FEATURE_H_

ios/chrome/browser/ui/infobars/infobar_feature.mm

@@ -17,6 +17,13 @@ const base::Feature kInfobarUIReboot{"InfobarUIReboot",
 const base::Feature kConfirmInfobarMessagesUI{"ConfirmInfobarMessagesUI",
                                               base::FEATURE_ENABLED_BY_DEFAULT};
 
+// Feature enabled by default since it will always be checked along
+// kInfobarUIReboot, effectively working as a kill switch. Meaning that if
+// kInfobarUIReboot is not enabled this feature won't work.
+// TODO(crbug.com/1014652): Enable by Default once feature should be tested.
+const base::Feature kSaveCardInfobarMessagesUI{
+    "SaveCardInfobarMessagesUI", base::FEATURE_DISABLED_BY_DEFAULT};
+
 bool IsInfobarUIRebootEnabled() {
   return base::FeatureList::IsEnabled(kInfobarUIReboot);
 }
@@ -25,3 +32,8 @@ bool IsConfirmInfobarMessagesUIEnabled() {
   return base::FeatureList::IsEnabled(kConfirmInfobarMessagesUI) &&
          IsInfobarUIRebootEnabled();
 }
+
+bool IsSaveCardInfobarMessagesUIEnabled() {
+  return base::FeatureList::IsEnabled(kSaveCardInfobarMessagesUI) &&
+         IsInfobarUIRebootEnabled();
+}