Get mojo_shell building inside chromium checkout.

mojo/shell/android/apk/src/org/chromium/mojo/shell/Bootstrap.java

+// 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.mojo.shell;
+
+import android.content.Context;
+
+import org.chromium.base.JNINamespace;
+
+import java.io.File;
+
+/**
+ * Runnable used to bootstrap execution of Android Mojo application. For the JNI to work, we need a
+ * Java class with the application classloader in the call stack. We load this class in the
+ * application classloader and call into native from it to achieve that.
+ */
+@JNINamespace("mojo::shell")
+public class Bootstrap implements Runnable {
+    private final Context mContext;
+    private final File mBootstrapNativeLibrary;
+    private final File mApplicationNativeLibrary;
+    private final int mHandle;
+    private final long mRunApplicationPtr;
+
+    public Bootstrap(Context context, File bootstrapNativeLibrary, File applicationNativeLibrary,
+            Integer handle, Long runApplicationPtr) {
+        mContext = context;
+        mBootstrapNativeLibrary = bootstrapNativeLibrary;
+        mApplicationNativeLibrary = applicationNativeLibrary;
+        mHandle = handle;
+        mRunApplicationPtr = runApplicationPtr;
+    }
+
+    @Override
+    public void run() {
+        System.load(mBootstrapNativeLibrary.getAbsolutePath());
+        System.load(mApplicationNativeLibrary.getAbsolutePath());
+        nativeBootstrap(mContext, mApplicationNativeLibrary.getAbsolutePath(), mHandle,
+                mRunApplicationPtr);
+    }
+
+    native void nativeBootstrap(Context context, String libraryPath, int handle,
+            long runApplicationPtr);
+}