[Android] Add render tests for personalized signin promos in NTP

This CL adds render tests for personalized signin promos in NTP content
suggestions and the golden files associated to each test.

Bug: 737743
Change-Id: I32cacf8cb5e8aac1a507581e43b18e765d790ecb
Reviewed-on: https://chromium-review.googlesource.com/667147Reviewed-by: Boris Sazonov <bsazonov@chromium.org>
Reviewed-by: Nicolas Dossou-Gbété <dgn@chromium.org>
Commit-Queue: Iulia Harasim <iuliah@google.com>
Cr-Commit-Position: refs/heads/master@{#502857}

chrome/android/java/src/org/chromium/chrome/browser/ntp/cards/SignInPromo.java

@@ -153,7 +153,7 @@ public class SignInPromo extends OptionalLeaf implements ImpressionTracker.Liste
         assert !mWasDismissed;
         if (mArePersonalizedPromosEnabled) {
             return new PersonalizedPromoViewHolder(
-                    parent, contextMenuManager, config, mProfileDataCache, mSigninPromoController);
+                    parent, config, contextMenuManager, mProfileDataCache, mSigninPromoController);
         }
         return new GenericPromoViewHolder(parent, contextMenuManager, config);
     }
@@ -324,13 +324,14 @@ public class SignInPromo extends OptionalLeaf implements ImpressionTracker.Liste
     /**
      * View Holder for {@link SignInPromo} if the personalized promo is to be shown.
      */
-    private static class PersonalizedPromoViewHolder extends CardViewHolder {
+    @VisibleForTesting
+    public static class PersonalizedPromoViewHolder extends CardViewHolder {
         private final ProfileDataCache mProfileDataCache;
         private final SigninPromoController mSigninPromoController;
 
-        public PersonalizedPromoViewHolder(SuggestionsRecyclerView parent,
-                ContextMenuManager contextMenuManager, UiConfig config,
-                ProfileDataCache profileDataCache, SigninPromoController signinPromoController) {
+        public PersonalizedPromoViewHolder(SuggestionsRecyclerView parent, UiConfig config,
+                ContextMenuManager contextMenuManager, ProfileDataCache profileDataCache,
+                SigninPromoController signinPromoController) {
             super(FeatureUtilities.isChromeHomeModernEnabled()
                             ? R.layout.personalized_signin_promo_view_modern_content_suggestions
                             : R.layout.personalized_signin_promo_view_ntp_content_suggestions,
@@ -372,6 +373,19 @@ public class SignInPromo extends OptionalLeaf implements ImpressionTracker.Liste
             SigninPromoView view = (SigninPromoView) itemView;
             mSigninPromoController.setupSigninPromoView(view.getContext(), view, null);
         }
+
+        /**
+         * Binds the view and sets the profile data directly. Used for testing purposes.
+         * @param profileData The profile data which will be used to configure the personalized
+         *         signin promo.
+         */
+        @VisibleForTesting
+        public void bindAndConfigureViewForTests(@Nullable DisplayableProfileData profileData) {
+            super.onBindViewHolder();
+            mSigninPromoController.setProfileData(profileData);
+            SigninPromoView view = (SigninPromoView) itemView;
+            mSigninPromoController.setupSigninPromoView(view.getContext(), view, null);
+        }
     }
 
     /** Defines the appearance and the behaviour of a generic Sign In Promo card. */