Begin adding class for laying out InfoBar controls

chrome/android/java/src/org/chromium/chrome/browser/infobar/InfoBarSubLayout.java

Index: chrome/android/java/src/org/chromium/chrome/browser/infobar/InfoBarSubLayout.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/infobar/InfoBarSubLayout.java b/chrome/android/java/src/org/chromium/chrome/browser/infobar/InfoBarSubLayout.java
new file mode 100644
index 0000000000000000000000000000000000000000..1b4e3dc29f1961ad72f49ecbc6d633a011e24c7f
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/infobar/InfoBarSubLayout.java
@@ -0,0 +1,64 @@
+// 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.
+
+package org.chromium.chrome.browser.infobar;
+
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.FrameLayout;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+import android.widget.Switch;
+import android.widget.TextView;
+
+import org.chromium.chrome.R;
+
+/**
+ * Lays out controls for InfoBars that require more than the standard pair of OK/CANCEL buttons.
+ *
+ * This class works with the {@link InfoBarLayout} to define a standard set of controls with
+ * standardized spacings and text styling that gets laid out in grid form: https://crbug.com/543205
+ *
+ * TODO(dfalcantara): Implement the measurement and layout algorithms.
+ */
+public class InfoBarSubLayout extends FrameLayout {
+
+    public InfoBarSubLayout(Context context) {
+        super(context);
+    }
+
+    /**
+     * Adds a toggle switch to the layout.
+     *
+     * -------------------------------------------------
+     * | ICON | MESSAGE                       | TOGGLE |
+     * -------------------------------------------------
+     * If an icon is not provided, the ImageView that would normally show it is hidden.
+     *
+     * @param iconResourceId ID of the drawable to use for the icon, or -1 to hide the ImageView.
+     * @param toggleMessage  Message to display for the toggle.
+     * @param isChecked      Whether the toggle should start off checked.
+     */
+    public LinearLayout addSwitch(
+            int iconResourceId, CharSequence toggleMessage, boolean isChecked) {
+        LinearLayout switchLayout = (LinearLayout) LayoutInflater.from(getContext()).inflate(
+                R.layout.infobar_subcontrol_toggle, this, false);
+        addView(switchLayout);
+
+        ImageView iconView = (ImageView) switchLayout.findViewById(R.id.subcontrol_toggle_icon);
+        if (iconResourceId != -1) {

[newt (away), 2015/11/05 05:52:16]

Android uses 0 and null to signify "no resource". Let's follow that pattern.

Also, you could make the icon visible by default and remove the ImageView if
iconResourceId == 0. That'd be slightly more memory efficient.

[gone, 2015/11/05 20:42:03]

Done.

+            iconView.setVisibility(View.VISIBLE);
+            iconView.setImageResource(iconResourceId);
+        }
+
+        TextView messageView = (TextView) switchLayout.findViewById(R.id.subcontrol_toggle_message);
+        messageView.setText(toggleMessage);
+
+        Switch switchView = (Switch) switchLayout.findViewById(R.id.subcontrol_toggle_switch);
+        switchView.setChecked(isChecked);
+
+        return switchLayout;
+    }
+}