Add ContextMenu support upstream for Android

chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuPopulatorWrapper.java

Index: chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuPopulatorWrapper.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuPopulatorWrapper.java b/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuPopulatorWrapper.java
new file mode 100644
index 0000000000000000000000000000000000000000..00051137d24655c8d0841b8bd76a37c4856a4816
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/contextmenu/ContextMenuPopulatorWrapper.java
@@ -0,0 +1,40 @@
+// Copyright 2013 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.contextmenu;
+
+import android.content.Context;
+import android.view.ContextMenu;
+
+/**
+ * A simple wrapper around a {@link ContextMenuPopulator} to handle delegating calls to another
+ * populator while allowing overriding of specific methods.
+ */
+public class ContextMenuPopulatorWrapper implements ContextMenuPopulator {
+    private final ContextMenuPopulator mPopulator;
+
+    /**
+     * Constructs an instance of a {@link ContextMenuPopulator} and delegate calls to
+     * {@code populator}.
+     * @param populator The {@link ContextMenuPopulator} to delegate calls to.
+     */
+    public ContextMenuPopulatorWrapper(ContextMenuPopulator populator) {
+        mPopulator = populator;
+    }
+
+    @Override
+    public boolean shouldShowContextMenu(ContextMenuParams params) {
+        return mPopulator.shouldShowContextMenu(params);
+    }
+
+    @Override
+    public void buildContextMenu(ContextMenu menu, Context context, ContextMenuParams params) {
+        mPopulator.buildContextMenu(menu, context, params);
+    }
+
+    @Override
+    public boolean onItemSelected(ContextMenuHelper helper, ContextMenuParams params, int itemId) {
+        return mPopulator.onItemSelected(helper, params, itemId);
+    }
+}