[Payment] should show all accepted card icon in payment editor.

chrome/android/java/src/org/chromium/chrome/browser/payments/ui/ExpandableGridView.java

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.payments.ui;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.widget.GridView;
+
+/**
+ * This class is a customized GridView which draws items in multiple lines automatically.
+ */
+public class ExpandableGridView extends GridView {
+    /** Constructor for when the gridview is inflated from XML. */
+    public ExpandableGridView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    @Override
+    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        // Heights of GridView is not working well in ScrollView even though has wrap_content
+        // attributes. by setting MeasureSpec.AT_MOST, GridView can work well forcely.

[gone, 2017/06/05 17:21:01]

// GridView does not work well in a ScrollView when it uses WRAP_CONTENT. 
Instead, force it to use
// AT_MOST. 
https://stackoverflow.com/questions/4523609/grid-of-images-inside-scrollview

[Hwanseung Lee, 2017/06/06 12:48:30]

Done.

+        final int heightSize = MeasureSpec.getSize(heightMeasureSpec);
+        int heightSpec;
+        if (getLayoutParams().height == LayoutParams.WRAP_CONTENT) {
+            heightSpec = MeasureSpec.makeMeasureSpec(heightSize, MeasureSpec.AT_MOST);
+        } else {
+            heightSpec = heightMeasureSpec;
+        }
+
+        super.onMeasure(widthMeasureSpec, heightSpec);
+    }
+}