Enable NativeActivity based Android tests.

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

Index: testing/android/native_test/java/src/org/chromium/native_test/NativeUnitTest.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/NativeUnitTest.java
similarity index 59%
copy from testing/android/native_test/java/src/org/chromium/native_test/NativeUnitTestActivity.java
copy to testing/android/native_test/java/src/org/chromium/native_test/NativeUnitTest.java
index 84115838972fbedbc8e6b056cfc1ded075cdfca5..d7209ba836e58757d4b9e6a9f1634c2080ab8fca 100644
--- a/testing/android/native_test/java/src/org/chromium/native_test/NativeUnitTestActivity.java
+++ b/testing/android/native_test/java/src/org/chromium/native_test/NativeUnitTest.java
@@ -4,7 +4,7 @@
 
 package org.chromium.native_test;
 
-import android.os.Bundle;
+import android.app.Activity;
 
 import org.chromium.base.ContextUtils;
 import org.chromium.base.Log;
@@ -13,24 +13,25 @@ import org.chromium.base.PowerMonitor;
 import org.chromium.base.library_loader.NativeLibraries;
 
 /**
- * An {@link android.app.Activity} for running native unit tests.
- * (i.e., not browser tests)
+ * A helper for running native unit tests (i.e., not browser tests)
  */
-public class NativeUnitTestActivity extends NativeTestActivity {
-
+public class NativeUnitTest extends NativeTest {
     private static final String TAG = "cr_NativeTest";
 
     @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
+    public void preCreate(Activity activity) {
+        super.preCreate(activity);
 
         // Needed by path_utils_unittest.cc
-        PathUtils.setPrivateDataDirectorySuffix("chrome", getApplicationContext());
+        PathUtils.setPrivateDataDirectorySuffix("chrome", activity.getApplicationContext());
 
         // Needed by system_monitor_unittest.cc
-        PowerMonitor.createForTests(this);
+        PowerMonitor.createForTests(activity);
 
-        ContextUtils.initApplicationContext(getApplicationContext());
+        ContextUtils.initApplicationContext(activity.getApplicationContext());
+        // For NativeActivity based tests,
+        // dependency libraries must be loaded before NativeActivity::OnCreate,
+        // otherwise loading android.app.lib_name will fail
         loadLibraries();
     }