Add a way to have three icon menu item

Add a layout and constants for supporting a menu
item with three icons in it.

BUG=478984

Review URL: https://codereview.chromium.org/1138993011

Cr-Commit-Position: refs/heads/master@{#330649}

chrome/android/java/res/layout/three_button_menu_item.xml

+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2015 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.
+-->
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="?android:attr/listPreferredItemHeightSmall"
+    android:layout_gravity="top|start"
+    android:orientation="horizontal">
+
+    <org.chromium.chrome.browser.widget.TintedImageButton
+        android:id="@+id/button_one"
+        android:layout_width="0dp"
+        android:layout_height="match_parent"
+        android:layout_weight="1"
+        android:background="?attr/listChoiceBackgroundIndicator"
+        android:scaleType="center" />
+
+    <org.chromium.chrome.browser.widget.TintedImageButton
+        android:id="@+id/button_two"
+        android:layout_width="0dp"
+        android:layout_height="match_parent"
+        android:layout_weight="1"
+        android:background="?attr/listChoiceBackgroundIndicator"
+        android:scaleType="center" />
+
+    <org.chromium.chrome.browser.widget.TintedImageButton
+        android:id="@+id/button_three"
+        android:layout_width="0dp"
+        android:layout_height="match_parent"
+        android:layout_weight="1"
+        android:background="?attr/listChoiceBackgroundIndicator"
+        android:scaleType="center" />
+</LinearLayout>

chrome/android/java/src/org/chromium/chrome/browser/appmenu/AppMenuAdapter.java

@@ -42,12 +42,16 @@ class AppMenuAdapter extends BaseAdapter {
     /**
      * Menu item that has four buttons. Every one of these buttons is displayed as an icon.
      */
-    private static final int FOUR_BUTTON_MENU_ITEM = 2;
+    private static final int THREE_BUTTON_MENU_ITEM = 2;
+    /**
+     * Menu item that has four buttons. Every one of these buttons is displayed as an icon.
+     */
+    private static final int FOUR_BUTTON_MENU_ITEM = 3;
 
     /**
      * The number of view types specified above.  If you add a view type you MUST increment this.
      */
-    private static final int VIEW_TYPE_COUNT = 3;
+    private static final int VIEW_TYPE_COUNT = 4;
 
     /** MenuItem Animation Constants */
     private static final int ENTER_ITEM_DURATION_MS = 350;
@@ -87,6 +91,8 @@ class AppMenuAdapter extends BaseAdapter {
 
         if (viewCount == 4) {
             return FOUR_BUTTON_MENU_ITEM;
+        } else if (viewCount == 3) {
+            return THREE_BUTTON_MENU_ITEM;
         } else if (viewCount == 2) {
             return TITLE_BUTTON_MENU_ITEM;
         }
@@ -145,6 +151,31 @@ class AppMenuAdapter extends BaseAdapter {
                 convertView.setEnabled(isEnabled);
                 break;
             }
+            case THREE_BUTTON_MENU_ITEM: {
+                ThreeButtonMenuItemViewHolder holder = null;
+                if (convertView == null) {
+                    holder = new ThreeButtonMenuItemViewHolder();
+                    convertView = mInflater.inflate(R.layout.three_button_menu_item, parent, false);
+                    holder.buttons[0] =
+                            (TintedImageButton) convertView.findViewById(R.id.button_one);
+                    holder.buttons[1] =
+                            (TintedImageButton) convertView.findViewById(R.id.button_two);
+                    holder.buttons[2] =
+                            (TintedImageButton) convertView.findViewById(R.id.button_three);
+                    convertView.setTag(holder);
+                    convertView.setTag(R.id.menu_item_enter_anim_id,
+                            buildIconItemEnterAnimator(holder.buttons));
+                } else {
+                    holder = (ThreeButtonMenuItemViewHolder) convertView.getTag();
+                }
+                for (int i = 0; i < 3; i++) {
+                    setupImageButton(holder.buttons[i], item.getSubMenu().getItem(i));
+                }
+
+                convertView.setFocusable(false);
+                convertView.setEnabled(false);
+                break;
+            }
             case FOUR_BUTTON_MENU_ITEM: {
                 FourButtonMenuItemViewHolder holder = null;
                 if (convertView == null) {
@@ -315,6 +346,10 @@ class AppMenuAdapter extends BaseAdapter {
         public AppMenuItemIcon image;
     }
 
+    static class ThreeButtonMenuItemViewHolder {
+        public TintedImageButton[] buttons = new TintedImageButton[3];
+    }
+
     static class FourButtonMenuItemViewHolder {
         public TintedImageButton[] buttons = new TintedImageButton[4];
     }