Revert of [Android] Refactor browser test execution.

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

Index: testing/android/native_test/java/src/org/chromium/native_test/NativeBrowserTestActivity.java
diff --git a/testing/android/native_test/java/src/org/chromium/native_test/NativeBrowserTestActivity.java b/testing/android/native_test/java/src/org/chromium/native_test/NativeBrowserTestActivity.java
index 0f6628a648c7e71395a4a4207529dc7cb952062a..ac2ddeef84a6dbca5b71775ae60e536965f2757c 100644
--- a/testing/android/native_test/java/src/org/chromium/native_test/NativeBrowserTestActivity.java
+++ b/testing/android/native_test/java/src/org/chromium/native_test/NativeBrowserTestActivity.java
@@ -6,16 +6,10 @@
 
 import android.os.Bundle;
 
-import org.chromium.base.Log;
-
-import java.io.File;
-
 /**
  * An {@link android.app.Activity} for running native browser tests.
  */
 public abstract class NativeBrowserTestActivity extends NativeTestActivity {
-
-    private static final String TAG = "cr.native_test";
 
     private static final String BROWSER_TESTS_FLAGS[] = {
         // content::kSingleProcessTestsFlag
@@ -38,43 +32,9 @@
 
     @Override
     public void onStart() {
-        deletePrivateDataDirectory();
         initializeBrowserProcess();
         super.onStart();
     }
-
-    /** Deletes a file or directory along with any of its children.
-     *
-     *  Note that, like File.delete(), this returns false if the file or directory couldn't be
-     *  fully deleted. This means that, in the directory case, some files may be deleted even if
-     *  the entire directory couldn't be.
-     *
-     *  @param file The file or directory to delete.
-     *  @return Whether or not the file or directory was deleted.
-     */
-    private static boolean deleteRecursive(File file) {
-        if (file == null) return true;
-
-        File[] children = file.listFiles();
-        if (children != null) {
-            for (File child : children) {
-                if (!deleteRecursive(child)) {
-                    return false;
-                }
-            }
-        }
-        return file.delete();
-    }
-
-    private void deletePrivateDataDirectory() {
-        File privateDataDirectory = getPrivateDataDirectory();
-        if (!deleteRecursive(privateDataDirectory)) {
-            Log.e(TAG, "Failed to remove %s", privateDataDirectory.getAbsolutePath());
-        }
-    }
-
-    /** Returns the test suite's private data directory. */
-    protected abstract File getPrivateDataDirectory();
 
     /** Initializes the browser process.
      *
@@ -82,4 +42,5 @@
      *  among other things.
      */
     protected abstract void initializeBrowserProcess();
+
 }