Revert "Password settings on iOS: use Title Case"

This reverts commit fd8b83c8.

Reason for revert: This CL breaks password_settings_eg_test, we might need to update the tests so they use the new A11y labels. Though I'm not sure if there's more than that. 

Original change's description:
> Password settings on iOS: use Title Case
> 
> Most of setting headers in the passwords seciton on iOS already use Title Case,
> except for the headers of the saved and blacklisted lists of passwords.
> 
> This CL fixes that by creating new strings for iOS settings inside
> ios/chrome/app/strings/ios_strings.grd. Previously the code used shared strings
> from the password_manager component (components/password_manager_strings.grdp).
> That string was also used by the old (non-MD) desktop settings, which have
> already been deprecated. The MD settings on desktop use the Title Case as iOS
> should as well, but the MD settings strings are consistently saved in
> chrome/app/settings_strings.grdp, where they cannot be shared with iOS.
> 
> The CL creates the new string instead of sharing the one from MD settings,
> because sharing has no benefit (on no build both strings are included, so no
> storage spared) and has the drawback of binding the style of both strings
> forever together.
> 
> The CL does not remove the component string yet. The old desktop settings code
> is still in the codebase, and the shared string (used only by the old settings)
> should be deleted once those old settings are deleted.
> 
> The CL was approved in https://chromium-review.googlesource.com/c/567181. This
> is a verbatim copy of that CL, but re-uploaded after Gerrit issues prevented me
> to actually land the original one. Hence I'm TBR-in lpromero@ who approved the
> original.
> TBR=lpromero@chromium.org
> 
> Bug: 740952
> Change-Id: I455b8f2a5edd1089916a7b87f20eddc3b274a2b7
> Reviewed-on: https://chromium-review.googlesource.com/567930
> Reviewed-by: Vaclav Brozek <vabr@chromium.org>
> Commit-Queue: Vaclav Brozek <vabr@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#485912}

TBR=vabr@chromium.org,lpromero@chromium.org

Change-Id: I41a5e01b086a1643a6f72f3934d5cfea6ceb57b6
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 740952
Reviewed-on: https://chromium-review.googlesource.com/568387Reviewed-by: Sergio Collazos <sczs@chromium.org>
Commit-Queue: Sergio Collazos <sczs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#485997}

ios/chrome/app/strings/ios_strings.grd

@@ -1245,12 +1245,6 @@ Handoff must also be enabled in the General section of Settings, and your device
       <message name="IDS_IOS_CONFIRM_PASSWORD_DELETION" desc="Label of a confirmation dialogue button which allows the user to confirm deletion of a stored password. [Length: one line] [iOS only]">
         Delete Saved Password
       </message>
-      <message name="IDS_IOS_SETTINGS_PASSWORDS_SAVED_HEADING" desc="The title for a list of username/site/password items. These items are already saved by the browser and can be deleted/edited. [Length: one line] [iOS only]">
-      Saved Passwords
-      </message>
-      <message name="IDS_IOS_SETTINGS_PASSWORDS_EXCEPTIONS_HEADING" desc="The title for a list of sites where passwords will not be saved. These items are already saved by the browser and can only be deleted. [Length: one line] [iOS only]">
-      Never Saved
-      </message>
       <message name="IDS_IOS_SIGNED_IN_ACCOUNTS_VIEW_OK_BUTTON" desc="The title of the OK button of the Signed In Accounts view [iOS only] [20em]">
         OK, Got It
       </message>

ios/chrome/browser/ui/settings/save_passwords_collection_view_controller.mm

@@ -22,6 +22,7 @@
 #include "components/password_manager/core/common/password_manager_pref_names.h"
 #include "components/prefs/pref_member.h"
 #include "components/prefs/pref_service.h"
+#include "components/strings/grit/components_strings.h"
 #include "components/url_formatter/url_formatter.h"
 #include "ios/chrome/browser/application_context.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
@@ -208,7 +209,7 @@ void SavePasswordsConsumer::OnGetPasswordStoreResults(
       CollectionViewTextItem* headerItem =
           [[CollectionViewTextItem alloc] initWithType:ItemTypeHeader];
       headerItem.text =
-          l10n_util::GetNSString(IDS_IOS_SETTINGS_PASSWORDS_SAVED_HEADING);
+          l10n_util::GetNSString(IDS_PASSWORD_MANAGER_SHOW_PASSWORDS_TAB_TITLE);
       headerItem.textColor = [[MDCPalette greyPalette] tint500];
       [model setHeader:headerItem
           forSectionWithIdentifier:SectionIdentifierSavedPasswords];
@@ -222,7 +223,7 @@ void SavePasswordsConsumer::OnGetPasswordStoreResults(
       CollectionViewTextItem* headerItem =
           [[CollectionViewTextItem alloc] initWithType:ItemTypeHeader];
       headerItem.text =
-          l10n_util::GetNSString(IDS_IOS_SETTINGS_PASSWORDS_EXCEPTIONS_HEADING);
+          l10n_util::GetNSString(IDS_PASSWORD_MANAGER_EXCEPTIONS_TAB_TITLE);
       headerItem.textColor = [[MDCPalette greyPalette] tint500];
       [model setHeader:headerItem
           forSectionWithIdentifier:SectionIdentifierBlacklist];