Adding a flag for new Password Form parsing on iOS.

This flag is cross-plaform flag, that was already added on all other platforms on
CL https://chromium-review.googlesource.com/c/chromium/src/+/1016648.


Bug: 831123
Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I9de727ac5203e0680eb113aa2531512ba6245198
Reviewed-on: https://chromium-review.googlesource.com/1141946Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Commit-Queue: Vadym Doroshenko <dvadym@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576418}

ios/chrome/browser/about_flags.mm

@@ -367,6 +367,10 @@ const flags_ui::FeatureEntry kFeatureEntries[] = {
     {"copy-image", flag_descriptions::kCopyImageName,
      flag_descriptions::kCopyImageDescription, flags_ui::kOsIos,
      FEATURE_VALUE_TYPE(kCopyImage)},
+    {"new-password-form-parsing",
+     flag_descriptions::kNewPasswordFormParsingName,
+     flag_descriptions::kNewPasswordFormParsingDescription, flags_ui::kOsIos,
+     FEATURE_VALUE_TYPE(password_manager::features::kNewPasswordFormParsing)},
 };
 
 // Add all switches from experimental flags to |command_line|.

ios/chrome/browser/ios_chrome_flag_descriptions.cc

@@ -180,6 +180,12 @@ const char kMemexTabSwitcherDescription[] =
     "prototype site instead of triggering the native Tab Switcher. The native "
     "TabSwitcher is accessible by long pressing the button";
 
+const char kNewPasswordFormParsingName[] = "New password form parsing";
+const char kNewPasswordFormParsingDescription[] =
+    "Replaces existing form parsing in password manager with a new version, "
+    "currently under development. WARNING: when enabled Password Manager might "
+    "stop working";
+
 const char kOmniboxUIElideSuggestionUrlAfterHostName[] =
     "Hide the path, query, and ref of omnibox suggestions";
 const char kOmniboxUIElideSuggestionUrlAfterHostDescription[] =

ios/chrome/browser/ios_chrome_flag_descriptions.h

@@ -148,6 +148,10 @@ extern const char kMarkHttpAsDescription[];
 extern const char kMemexTabSwitcherName[];
 extern const char kMemexTabSwitcherDescription[];
 
+// Title and description for the flag to enable new password form parsing.
+extern const char kNewPasswordFormParsingName[];
+extern const char kNewPasswordFormParsingDescription[];
+
 // Title and description for the flag to enable elision of the URL path, query,
 // and ref in omnibox URL suggestions.
 extern const char kOmniboxUIElideSuggestionUrlAfterHostName[];