[AF] Add learn more button in Payment Methods settings page.

Bug: 883923
Change-Id: I3e35456bda1347ae060fe2748b0126dfa312f27e
Reviewed-on: https://chromium-review.googlesource.com/1224659Reviewed-by: Michael Giuffrida <michaelpg@chromium.org>
Commit-Queue: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#591215}

chrome/browser/resources/settings/passwords_and_forms_page/passwords_and_forms_page.html

@@ -59,7 +59,8 @@
       <template is="dom-if" route-path="/payments">
         <settings-subpage
             associated-control="[[$$('#paymentManagerButton')]]"
-            page-title="$i18n{creditCards}">
+            page-title="$i18n{creditCards}"
+            learn-more-url="$i18n{paymentMethodsLearnMoreURL}">
           <settings-payments-section id="paymentSection" prefs="{{prefs}}">
           </settings-payments-section>
         </settings-subpage>

chrome/browser/resources/settings/people_page/people_page.html

@@ -401,7 +401,8 @@
         <template is="dom-if" route-path="/payments">
           <settings-subpage
               associated-control="[[$$('#paymentManagerButton')]]"
-              page-title="$i18n{creditCards}">
+              page-title="$i18n{creditCards}"
+              learn-more-url="$i18n{paymentMethodsLearnMoreURL}">
             <settings-payments-section id="paymentsSection" prefs="{{prefs}}">
             </settings-payments-section>
           </settings-subpage>

chrome/browser/ui/webui/settings/md_settings_localized_strings_provider.cc

@@ -1497,6 +1497,8 @@ void AddPasswordsAndFormsStrings(content::WebUIDataSource* html_source,
                          autofill::payments::GetManageAddressesUrl(0).spec());
   html_source->AddString("manageCreditCardsUrl",
                          autofill::payments::GetManageInstrumentsUrl(0).spec());
+  html_source->AddString("paymentMethodsLearnMoreURL",
+                         chrome::kPaymentMethodsLearnMoreURL);
   html_source->AddBoolean(
       "migrationEnabled",
       autofill::features::GetLocalCardMigrationExperimentalFlag() ==

chrome/common/url_constants.cc

@@ -176,6 +176,13 @@ const char kPasswordManagerLearnMoreURL[] =
     "https://support.google.com/chrome/?p=settings_password";
 #endif
 
+const char kPaymentMethodsLearnMoreURL[] =
+#if defined(OS_CHROMEOS)
+    "https://support.google.com/chromebook/?p=settings_autofill";
+#else
+    "https://support.google.com/chrome/?p=settings_autofill";
+#endif
+
 const char kPrivacyLearnMoreURL[] =
 #if defined(OS_CHROMEOS)
     "https://support.google.com/chromebook/?p=settings_privacy";

chrome/common/url_constants.h

@@ -153,6 +153,8 @@ extern const char kPageInfoHelpCenterURL[];
 
 extern const char kPasswordManagerLearnMoreURL[];
 
+extern const char kPaymentMethodsLearnMoreURL[];
+
 // "Learn more" URL for the Privacy section under Options.
 extern const char kPrivacyLearnMoreURL[];