[iOS] Adding Google services link in Privacy section

Adding footer with: "For more settings that relate to privacy, security,
and data collection, see Sync and Google Services.", in Private
settings.
With a link in the string to open the Sync and Google Services settings.

https://drive.google.com/open?id=1MNsIMDmYlsb9TKDLSSYpblCXpD1x4Mmj

Bug: 956731
Change-Id: Icd918df58039f9b0d676982c3e3c01a22fbca109
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1587885
Commit-Queue: Jérôme Lebel <jlebel@chromium.org>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#654824}

ios/chrome/app/strings/ios_strings.grd

@@ -1073,6 +1073,9 @@ Handoff must also be enabled in the General section of Settings, and your device
       <message name="IDS_IOS_OPTIONS_PRELOAD_WEBPAGES" desc="Title for opening the setting for if/when to preload webpages. [Length: 20em] [iOS only]">
         Preload Webpages
       </message>
+      <message name="IDS_IOS_OPTIONS_PRIVACY_GOOGLE_SERVICES_FOOTER" desc="Footer to invite the user to open the Sync and Google Services settings.">
+        For more settings that relate to privacy, security, and data collection, see <ph name="BEGIN_LINK">BEGIN_LINK</ph>Sync and Google Services<ph name="END_LINK">END_LINK</ph>.
+      </message>
       <message name="IDS_IOS_OPTIONS_REPORT_AN_ISSUE" desc="Title for the option on Settings page to report an issue. [Length: 20em] [iOS only]">
         Report an Issue
       </message>

ios/chrome/app/strings/ios_strings_grd/IDS_IOS_OPTIONS_PRIVACY_GOOGLE_SERVICES_FOOTER.png.sha1

+d3b8b81f6f3c89161e65b9c72b694ebfe8489efc
\ No newline at end of file

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

@@ -69,8 +69,14 @@ typedef NS_ENUM(NSInteger, ItemType) {
   ItemTypeWebServicesShowSuggestions,
   ItemTypeWebServicesFooter,
   ItemTypeClearBrowsingDataClear,
+  // Footer to suggest the user to open Sync and Google services settings.
+  ItemTypeClearBrowsingDataFooter,
 };
 
+// Only used in this class to openn the Sync and Google services settings.
+// This link should not be dispatched.
+GURL kGoogleServicesSettingsURL("settings://open_google_services");
+
 }  // namespace
 
 @interface PrivacyTableViewController () <BooleanObserver,
@@ -185,6 +191,10 @@ typedef NS_ENUM(NSInteger, ItemType) {
   [model addSectionWithIdentifier:SectionIdentifierClearBrowsingData];
   [model addItem:[self clearBrowsingDetailItem]
       toSectionWithIdentifier:SectionIdentifierClearBrowsingData];
+  if (unified_consent::IsUnifiedConsentFeatureEnabled()) {
+    [model setFooter:[self showClearBrowsingDataFooterItem]
+        forSectionWithIdentifier:SectionIdentifierClearBrowsingData];
+  }
 }
 
 #pragma mark - Model Objects
@@ -225,6 +235,19 @@ typedef NS_ENUM(NSInteger, ItemType) {
   return showSuggestionsFooterItem;
 }
 
+// Creates TableViewHeaderFooterItem instance to show a link to open the Sync
+// and Google services settings.
+- (TableViewHeaderFooterItem*)showClearBrowsingDataFooterItem {
+  TableViewLinkHeaderFooterItem* showClearBrowsingDataFooterItem =
+      [[TableViewLinkHeaderFooterItem alloc]
+          initWithType:ItemTypeClearBrowsingDataFooter];
+  showClearBrowsingDataFooterItem.text =
+      l10n_util::GetNSString(IDS_IOS_OPTIONS_PRIVACY_GOOGLE_SERVICES_FOOTER);
+  showClearBrowsingDataFooterItem.linkURL = kGoogleServicesSettingsURL;
+
+  return showClearBrowsingDataFooterItem;
+}
+
 - (TableViewItem*)clearBrowsingDetailItem {
   return [self detailItemWithType:ItemTypeClearBrowsingDataClear
                           titleId:IDS_IOS_CLEAR_BROWSING_DATA_TITLE
@@ -326,12 +349,9 @@ typedef NS_ENUM(NSInteger, ItemType) {
     viewForFooterInSection:(NSInteger)section {
   UIView* footerView =
       [super tableView:tableView viewForFooterInSection:section];
-  if (SectionIdentifierWebServices ==
-          [self.tableViewModel sectionIdentifierForSection:section] &&
-      !unified_consent::IsUnifiedConsentFeatureEnabled()) {
-    // The footer view is only shown when Unified consent flag is off.
-    TableViewLinkHeaderFooterView* footer =
-        base::mac::ObjCCastStrict<TableViewLinkHeaderFooterView>(footerView);
+  TableViewLinkHeaderFooterView* footer =
+      base::mac::ObjCCast<TableViewLinkHeaderFooterView>(footerView);
+  if (footer) {
     footer.delegate = self;
   }
   return footerView;
@@ -507,4 +527,16 @@ typedef NS_ENUM(NSInteger, ItemType) {
   }
 }
 
+#pragma mark - TableViewLinkHeaderFooterItemDelegate
+
+- (void)view:(TableViewLinkHeaderFooterView*)view didTapLinkURL:(GURL)URL {
+  if (URL == kGoogleServicesSettingsURL) {
+    // kGoogleServicesSettingsURL is not a realy link. It should be handled
+    // with a special case.
+    [self.dispatcher showGoogleServicesSettingsFromViewController:self];
+  } else {
+    [super view:view didTapLinkURL:URL];
+  }
+}
+
 @end