Drop '2' suffix from CS2, SBS2

Now that CS1 and SBS1 have been deleted, the suffixes of "2" on
a lot of classes is unncessary and confusing. Drop the suffix.

Change-Id: Icb8c4797f59f259601f4e436bd2f04a13a904bbc

gerrit-gwtui/src/main/java/com/google/gerrit/client/diff/UpToChangeCommand.java

@@ -0,0 +1,38 @@
+// Copyright (C) 2013 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gerrit.client.diff;
+
+import com.google.gerrit.client.Gerrit;
+import com.google.gerrit.client.patches.PatchUtil;
+import com.google.gerrit.common.PageLinks;
+import com.google.gerrit.reviewdb.client.PatchSet;
+import com.google.gwt.event.dom.client.KeyPressEvent;
+import com.google.gwtexpui.globalkey.client.KeyCommand;
+
+class UpToChangeCommand extends KeyCommand {
+  private final PatchSet.Id revision;
+
+  UpToChangeCommand(PatchSet.Id revision, int mask, int key) {
+    super(mask, key, PatchUtil.C.upToChange());
+    this.revision = revision;
+  }
+
+  @Override
+  public void onKeyPress(final KeyPressEvent event) {
+    Gerrit.display(PageLinks.toChange(
+        revision.getParentKey(),
+        revision.getId()));
+  }
+}