Add support for datalist to text input element on Android

ui/android/java/src/org/chromium/ui/autofill/AutofillPopup.java

Index: ui/android/java/src/org/chromium/ui/autofill/AutofillPopup.java
diff --git a/ui/android/java/src/org/chromium/ui/autofill/AutofillPopup.java b/ui/android/java/src/org/chromium/ui/autofill/AutofillPopup.java
index 0483b0272154afacca5c57178f3403e240c8b2bb..1612f0b15bb5902172d90553450e1d2191749d3b 100644
--- a/ui/android/java/src/org/chromium/ui/autofill/AutofillPopup.java
+++ b/ui/android/java/src/org/chromium/ui/autofill/AutofillPopup.java
@@ -16,6 +16,9 @@ import android.widget.ListPopupWindow;
 import android.widget.TextView;
 
 import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
 
 import org.chromium.ui.R;
 import org.chromium.ui.ViewAndroidDelegate;
@@ -29,11 +32,12 @@ public class AutofillPopup extends ListPopupWindow implements AdapterView.OnItem
      * Constants defining types of Autofill suggestion entries.
      * Has to be kept in sync with enum in WebAutofillClient.h
      *
-     * Not supported: MenuItemIDWarningMessage, MenuItemIDSeparator, MenuItemIDClearForm, and
+     * Not supported: MenuItemIDWarningMessage, MenuItemIDClearForm, and
      * MenuItemIDAutofillOptions.
      */
     private static final int ITEM_ID_AUTOCOMPLETE_ENTRY = 0;
     private static final int ITEM_ID_PASSWORD_ENTRY = -2;
+    private static final int ITEM_ID_SEPARATOR_ENTRY = -3;
     private static final int ITEM_ID_DATA_LIST_ENTRY = -6;
 
     private static final int TEXT_PADDING_DP = 30;
@@ -49,6 +53,7 @@ public class AutofillPopup extends ListPopupWindow implements AdapterView.OnItem
     private Paint mLabelViewPaint;
     private Paint mSublabelViewPaint;
     private OnLayoutChangeListener mLayoutChangeListener;
+    private List<AutofillSuggestion> mSuggestions;
 
     /**
      * An interface to handle the touch interaction with an AutofillPopup object.
@@ -105,6 +110,7 @@ public class AutofillPopup extends ListPopupWindow implements AdapterView.OnItem
         // An ugly hack to keep the popup from expanding on top of the keyboard.
         setInputMethodMode(INPUT_METHOD_NEEDED);
         super.show();
+        getListView().setDividerHeight(0);
     }
 
     /**
@@ -131,16 +137,20 @@ public class AutofillPopup extends ListPopupWindow implements AdapterView.OnItem
      * @param suggestions Autofill suggestion data.
      */
     public void show(AutofillSuggestion[] suggestions) {
+        mSuggestions = new ArrayList<AutofillSuggestion>(Arrays.asList(suggestions));
         // Remove the AutofillSuggestions with IDs that are not supported by Android
         ArrayList<AutofillSuggestion> cleanedData = new ArrayList<AutofillSuggestion>();
+        HashSet<Integer> separators = new HashSet<Integer>();
         for (int i = 0; i < suggestions.length; i++) {
             int itemId = suggestions[i].mUniqueId;
             if (itemId > 0 || itemId == ITEM_ID_AUTOCOMPLETE_ENTRY ||
                     itemId == ITEM_ID_PASSWORD_ENTRY || itemId == ITEM_ID_DATA_LIST_ENTRY) {
                 cleanedData.add(suggestions[i]);
+            } else if (itemId == ITEM_ID_SEPARATOR_ENTRY) {
+                separators.add(cleanedData.size());
             }
         }
-        setAdapter(new AutofillListAdapter(mContext, cleanedData));
+        setAdapter(new AutofillListAdapter(mContext, cleanedData, separators));
         // Once the mAnchorRect is resized and placed correctly, it will show the Autofill popup.
         mAnchorWidth = Math.max(getDesiredWidth(cleanedData), mAnchorWidth);
         mViewAndroidDelegate.setAnchorViewPosition(mAnchorView, mAnchorX, mAnchorY, mAnchorWidth,
@@ -208,7 +218,10 @@ public class AutofillPopup extends ListPopupWindow implements AdapterView.OnItem
 
     @Override
     public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
-        mAutofillCallback.suggestionSelected(position);
+        AutofillListAdapter adapter = (AutofillListAdapter) parent.getAdapter();
+        int listIndex = mSuggestions.indexOf(adapter.getItem(position));
+        assert listIndex > -1;
+        mAutofillCallback.suggestionSelected(listIndex);
     }
 
 }