Moving BindingManager and ChildProcessConnection to base/.

base/android/java/src/org/chromium/base/process_launcher/ChildProcessConstants.java

+// Copyright 2017 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.base.process_launcher;
+
+/**
+ * Constants used as names for the items placed in the Bundle passed in the
+ * IChildProcessService.setupConnection call, once the connection has been established by child
+ * processes.
+ */
+public interface ChildProcessConstants {
+    // Key for the command line.
+    public static final String EXTRA_COMMAND_LINE =
+            "org.chromium.base.process_launcher.command_line";
+
+    // Key for the file descriptors that should be mapped in the child process.
+    public static final String EXTRA_FILES = "org.chromium.base.process_launcher.files";
+}