android: Move launcher_android.cc to helper

content/browser/child_process_launcher_helper_android.h

Index: content/browser/child_process_launcher_helper_android.h
diff --git a/content/browser/child_process_launcher_helper_android.h b/content/browser/child_process_launcher_helper_android.h
new file mode 100644
index 0000000000000000000000000000000000000000..50c083872e02d0df5d02e48d281f810eeae61947
--- /dev/null
+++ b/content/browser/child_process_launcher_helper_android.h
@@ -0,0 +1,16 @@
+// 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.
+
+#ifndef CONTENT_BROWSER_CHILD_PROCESS_LAUNCHER_HELPER_ANDROID_H_
+#define CONTENT_BROWSER_CHILD_PROCESS_LAUNCHER_HELPER_ANDROID_H_
+
+#include <jni.h>
+
+namespace content {
+
+bool RegisterChildProcessLauncher(JNIEnv* env);
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_CHILD_PROCESS_LAUNCHER_HELPER_ANDROID_H_