[Autofill Assistant] Fixed crash in AA payment request.

This CL fixes two possible crashes in AA PR:
 1) When updating the contact details section, even though the contact details were not requested (and are not visible).
 2) When updating the contact details section before a contact editor was set. Converting autofill profiles to autofill contacts is currently done via ContactDetailsSection, which in turn relies on a non-null ContactEditor for the conversion.

1) is easy to fix (wrap in if statement).
As a workaround for 2), this CL creates a temporary contact editor in those cases. A proper fix would decouple the UI aspects (editor) from the backend aspects (converting autofill profiles to contacts), but this requires some more refactoring and is out-of-scope for now.

Bug: 806868
Change-Id: I26e511d405930166ebac858f8f878d924f6c1843
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1627352
Commit-Queue: Clemens Arbesser <arbesser@google.com>
Reviewed-by: Mathias Carlen <mcarlen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#662606}

chrome/android/features/autofill_assistant/java/src/org/chromium/chrome/browser/autofill_assistant/payment/AssistantPaymentRequestBinder.java

@@ -195,9 +195,18 @@ class AssistantPaymentRequestBinder
             if (autofillProfiles == null) {
                 autofillProfiles = Collections.emptyList();
             }
-            view.mContactDetailsSection.onProfilesChanged(autofillProfiles);
+            if (shouldShowContactDetails(model)) {
+                view.mContactDetailsSection.onProfilesChanged(autofillProfiles,
+                        model.get(AssistantPaymentRequestModel.REQUEST_EMAIL),
+                        model.get(AssistantPaymentRequestModel.REQUEST_NAME),
+                        model.get(AssistantPaymentRequestModel.REQUEST_PHONE));
+            }
+            if (model.get(AssistantPaymentRequestModel.REQUEST_PAYMENT)) {
                 view.mPaymentMethodSection.onProfilesChanged(autofillProfiles);
+            }
+            if (model.get(AssistantPaymentRequestModel.REQUEST_SHIPPING_ADDRESS)) {
                 view.mShippingAddressSection.onProfilesChanged(autofillProfiles);
+            }
             return true;
         }
         return false;

chrome/android/features/autofill_assistant/java/src/org/chromium/chrome/browser/autofill_assistant/payment/AssistantPaymentRequestContactDetailsSection.java

@@ -40,6 +40,13 @@ public class AssistantPaymentRequestContactDetailsSection
 
     public void setEditor(ContactEditor editor) {
         mEditor = editor;
+        if (mEditor == null) {
+            return;
+        }
+
+        for (AutofillContact contact : getItems()) {
+            addAutocompleteInformationToEditor(contact);
+        }
     }
 
     @Override
@@ -47,7 +54,7 @@ public class AssistantPaymentRequestContactDetailsSection
         if (mEditor != null) {
             mIgnoreProfileChangeNotifications = true;
             mEditor.edit(oldItem,
-                    editedOption -> { onItemCreatedOrEdited(oldItem, oldFullView, editedOption); });
+                    editedOption -> onItemCreatedOrEdited(oldItem, oldFullView, editedOption));
             mIgnoreProfileChangeNotifications = false;
         }
     }
@@ -98,20 +105,32 @@ public class AssistantPaymentRequestContactDetailsSection
      * The Chrome profiles have changed externally. This will rebuild the UI with the new/changed
      * set of profiles, while keeping the selected item if possible.
      */
-    void onProfilesChanged(List<AutofillProfile> profiles) {
+    void onProfilesChanged(List<AutofillProfile> profiles, boolean requestPayerEmail,
+            boolean requestPayerName, boolean requestPayerPhone) {
         if (mIgnoreProfileChangeNotifications) {
             return;
         }
 
+        if (!requestPayerEmail && !requestPayerName && !requestPayerPhone) {
+            return;
+        }
+
+        // Note: we create a temporary editor (necessary for converting profiles to contacts)
+        // instead of using mEditor, which may be null.
+        ContactEditor tempEditor =
+                new ContactEditor(requestPayerName, requestPayerPhone, requestPayerEmail, false);
         AutofillContact previouslySelectedContact = mSelectedOption;
 
         // Convert profiles into a list of |AutofillContact|.
         int selectedContactIndex = -1;
         ContactDetailsSection sectionInformation =
-                new ContactDetailsSection(mContext, profiles, mEditor, null);
+                new ContactDetailsSection(mContext, profiles, tempEditor, null);
         List<AutofillContact> contacts = new ArrayList<>();
         for (int i = 0; i < sectionInformation.getSize(); i++) {
             AutofillContact contact = (AutofillContact) sectionInformation.getItem(i);
+            if (contact == null) {
+                continue;
+            }
             contacts.add(contact);
             if (previouslySelectedContact != null
                     && TextUtils.equals(
@@ -126,7 +145,13 @@ public class AssistantPaymentRequestContactDetailsSection
 
     @Override
     protected void onItemAddedOrUpdated(AutofillContact contact) {
-        // Update autocomplete information in the editor.
+        addAutocompleteInformationToEditor(contact);
+    }
+
+    private void addAutocompleteInformationToEditor(AutofillContact contact) {
+        if (mEditor == null) {
+            return;
+        }
         mEditor.addEmailAddressIfValid(contact.getPayerEmail());
         mEditor.addPayerNameIfValid(contact.getPayerName());
         mEditor.addPhoneNumberIfValid(contact.getPayerPhone());

chrome/android/features/autofill_assistant/java/src/org/chromium/chrome/browser/autofill_assistant/payment/AssistantPaymentRequestSection.java

@@ -33,8 +33,8 @@ public abstract class AssistantPaymentRequestSection<T extends EditableOption> {
     private final AssistantChoiceList mItemsView;
     private final View mSummaryView;
     private final int mFullViewResId;
-    private final List<Item> mItems;
     private final int mTitleToContentPadding;
+    private final List<Item> mItems;
 
     protected final Context mContext;
     protected T mSelectedOption;
@@ -171,6 +171,17 @@ public abstract class AssistantPaymentRequestSection<T extends EditableOption> {
         }
     }
 
+    /**
+     * Returns the list of items.
+     */
+    List<T> getItems() {
+        List<T> items = new ArrayList<>();
+        for (Item item : mItems) {
+            items.add(item.mOption);
+        }
+        return items;
+    }
+
     void addOrUpdateItem(@Nullable T option, boolean select) {
         if (option == null) {
             return;