[Android] Refactor the native test wrappers.

testing/android/native_test/java/src/org/chromium/native_test/NativeUnitTestActivity.java

Index: testing/android/native_test/java/src/org/chromium/native_test/NativeUnitTestActivity.java
diff --git a/testing/android/native_test/java/src/org/chromium/native_test/NativeUnitTestActivity.java b/testing/android/native_test/java/src/org/chromium/native_test/NativeUnitTestActivity.java
new file mode 100644
index 0000000000000000000000000000000000000000..e987169c14a690be66b04ac22e03ffad7ebc6122
--- /dev/null
+++ b/testing/android/native_test/java/src/org/chromium/native_test/NativeUnitTestActivity.java
@@ -0,0 +1,37 @@
+// Copyright 2015 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.native_test;
+
+import android.os.Bundle;
+
+import org.chromium.base.PathUtils;
+import org.chromium.base.PowerMonitor;
+import org.chromium.base.ResourceExtractor;
+
+/**
+ * An {@link android.app.Activity} for running native unit tests.
+ * (i.e., not browser tests)
+ */
+public class NativeUnitTestActivity extends NativeTestActivity {
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        // Needed by path_utils_unittest.cc
+        PathUtils.setPrivateDataDirectorySuffix("chrome", getApplicationContext());
+
+        ResourceExtractor resourceExtractor = ResourceExtractor.get(getApplicationContext());
+        resourceExtractor.setExtractAllPaksAndV8SnapshotForTesting();
+        resourceExtractor.startExtractingResources();
+        resourceExtractor.waitForCompletion();
+
+        // Needed by system_monitor_unittest.cc
+        PowerMonitor.createForTests(this);
+
+        loadLibraries();
+    }
+
+}