Get mojo_shell building inside chromium checkout.

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

+// 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.mojo.shell;
+
+import android.util.Log;
+
+import org.chromium.base.BaseChromiumApplication;
+import org.chromium.base.PathUtils;
+import org.chromium.base.library_loader.LibraryLoader;
+import org.chromium.base.library_loader.LibraryProcessType;
+import org.chromium.base.library_loader.ProcessInitException;
+
+/**
+ * MojoShell implementation of {@link android.app.Application}, managing application-level global
+ * state and initializations.
+ */
+public class MojoShellApplication extends BaseChromiumApplication {
+    private static final String TAG = "MojoShellApplication";
+    private static final String PRIVATE_DATA_DIRECTORY_SUFFIX = "mojo_shell";
+
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        clearTemporaryFiles();
+        initializeJavaUtils();
+        initializeNative();
+    }
+
+    /**
+     * Deletes the temporary files and directories created in the previous run of the application.
+     * This is important regardless of cleanups on exit, as the previous run could have crashed.
+     */
+    private void clearTemporaryFiles() {
+        AndroidHandler.clearTemporaryFiles(this);
+    }
+
+    /**
+     * Initializes Java-side utils.
+     */
+    private void initializeJavaUtils() {
+        PathUtils.setPrivateDataDirectorySuffix(PRIVATE_DATA_DIRECTORY_SUFFIX);
+    }
+
+    /**
+     * Loads the native library.
+     */
+    private void initializeNative() {
+        try {
+            LibraryLoader.get(LibraryProcessType.PROCESS_BROWSER).ensureInitialized();
+        } catch (ProcessInitException e) {
+            Log.e(TAG, "libmojo_shell initialization failed.", e);
+            throw new RuntimeException(e);
+        }
+    }
+}