[Android] Hide SELECT popups on scroll start.

Select popup is still visible during mouse wheel scroll
outside select popup dialog, which is not a correct behaviour
in android. Hence we hide the select popup during page scroll
in android.

Bug: 967563
Change-Id: I0bab0fb5beca7046bbf802b7935f785bf352f9b5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1631811Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
Reviewed-by: Changwan Ryu <changwan@chromium.org>
Reviewed-by: AJITH KUMAR V <ajith.v@samsung.com>
Commit-Queue: AJITH KUMAR V <ajith.v@samsung.com>
Cr-Commit-Position: refs/heads/master@{#664679}

content/public/android/java/src/org/chromium/content/browser/input/SelectPopup.java

@@ -150,8 +150,8 @@ public class SelectPopup implements HideablePopup, ViewAndroidDelegate.Container
         WebContentsAccessibilityImpl wcax =
                 WebContentsAccessibilityImpl.fromWebContents(mWebContents);
         if (DeviceFormFactor.isTablet() && !multiple && !wcax.isTouchExplorationEnabled()) {
-            mPopupView = new SelectPopupDropdown(
-                    this, context, anchorView, popupItems, selectedIndices, rightAligned);
+            mPopupView = new SelectPopupDropdown(this, context, anchorView, popupItems,
+                    selectedIndices, rightAligned, mWebContents);
         } else {
             mPopupView =
                     new SelectPopupDialog(this, context, popupItems, multiple, selectedIndices);

content/public/android/java/src/org/chromium/content/browser/input/SelectPopupDropdown.java

@@ -9,6 +9,9 @@ import android.view.View;
 import android.widget.AdapterView;
 import android.widget.PopupWindow;
 
+import org.chromium.content_public.browser.GestureListenerManager;
+import org.chromium.content_public.browser.GestureStateListener;
+import org.chromium.content_public.browser.WebContents;
 import org.chromium.ui.DropdownAdapter;
 import org.chromium.ui.DropdownPopupWindow;
 
@@ -24,7 +27,8 @@ public class SelectPopupDropdown implements SelectPopup.Ui {
     private boolean mSelectionNotified;
 
     public SelectPopupDropdown(SelectPopup selectPopup, Context context, View anchorView,
-            List<SelectPopupItem> items, int[] selected, boolean rightAligned) {
+            List<SelectPopupItem> items, int[] selected, boolean rightAligned,
+            WebContents webContents) {
         mSelectPopup = selectPopup;
         mDropdownPopupWindow = new DropdownPopupWindow(context, anchorView);
         mDropdownPopupWindow.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@@ -49,6 +53,12 @@ public class SelectPopupDropdown implements SelectPopup.Ui {
                         notifySelection(null);
                     }
                 });
+        GestureListenerManager.fromWebContents(webContents).addListener(new GestureStateListener() {
+            @Override
+            public void onScrollStarted(int scrollOffsetY, int scrollExtentY) {
+                hide(true);
+            }
+        });
     }
 
     private void notifySelection(int[] indicies) {