Upstream accessibility tab switcher and related resources.

chrome/android/java/src/org/chromium/chrome/browser/widget/accessibility/AccessibilityTabModelListView.java

Index: chrome/android/java/src/org/chromium/chrome/browser/widget/accessibility/AccessibilityTabModelListView.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/widget/accessibility/AccessibilityTabModelListView.java b/chrome/android/java/src/org/chromium/chrome/browser/widget/accessibility/AccessibilityTabModelListView.java
new file mode 100644
index 0000000000000000000000000000000000000000..19f0e09c64cc5e5e1753c80bed4b3e2bb2f2169f
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/widget/accessibility/AccessibilityTabModelListView.java
@@ -0,0 +1,49 @@
+// Copyright 2014 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.widget.accessibility;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import android.widget.ListView;
+
+/**
+ * A {@link ListView} class that is responsible for providing a visual interpretation
+ * of a {@link org.chromium.chrome.browser.tabmodel.TabModel}.
+ */
+public class AccessibilityTabModelListView extends ListView {
+    private final AccessibilityTabModelAdapter mAdapter;
+    private boolean mCanScrollVertically = true;
+
+    /**
+     * @param context The Context to build this widget under.
+     * @param attrs The AttributeSet to use to build this widget.
+     */
+    public AccessibilityTabModelListView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        mAdapter = new AccessibilityTabModelAdapter(getContext(), this);
+    }
+
+    @Override
+    public void onFinishInflate() {
+        super.onFinishInflate();
+
+        setAdapter(mAdapter);
+    }
+
+    @Override
+    public boolean onInterceptTouchEvent(MotionEvent e) {
+        // Ignore touch events if we're not scrolling.
+        if (!mCanScrollVertically) return false;
+        return super.onInterceptTouchEvent(e);
+    }
+
+    /**
+     * @param canScroll Whether or not the ListView should be allowed to scroll vertically.
+     */
+    public void setCanScroll(boolean canScroll) {
+        mCanScrollVertically = canScroll;
+    }
+}