Add an activity that allows whitelisted applications to clear all data in Chrome.

chrome/android/java/src/org/chromium/chrome/browser/child_accounts/ResetDataActivity.java

Index: chrome/android/java/src/org/chromium/chrome/browser/child_accounts/ResetDataActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/child_accounts/ResetDataActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/child_accounts/ResetDataActivity.java
new file mode 100644
index 0000000000000000000000000000000000000000..a8907f13099f3885de3dcaafe199f79b5ef4819e
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/child_accounts/ResetDataActivity.java
@@ -0,0 +1,73 @@
+// 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.chrome.browser.child_accounts;
+
+import android.annotation.TargetApi;
+import android.app.Activity;
+import android.app.ActivityManager;
+import android.content.Context;
+import android.os.Build;
+import android.os.Bundle;
+import android.support.v4.app.DialogFragment;
+import android.support.v4.app.FragmentActivity;
+
+import org.chromium.chrome.browser.firstrun.FirstRunStatus;
+
+/**
+ * An activity that prompts the user to reset all data in Chrome,
+ * as part of the child account setup.
+ */
+public class ResetDataActivity extends FragmentActivity implements
+        ResetDataDialogFragment.DialogListener {
+
+    private static final String FRAGMENT_TAG = "reset-data";
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        // If the user has not been through the first run yet, we assume there is no data of
+        // interest to clear, so we immediately return success.
+        if (!FirstRunStatus.getFirstRunFlowComplete(this)) {
+            returnResult(true);
+            return;
+        }
+        DialogFragment dialog = new ResetDataDialogFragment(this, this);
+        dialog.show(getSupportFragmentManager(), FRAGMENT_TAG);
+    }
+
+    @Override
+    public void onResetData(DialogFragment dialog) {
+        if (!resetData()) {
+            returnResult(false);
+            return;
+        }
+        returnResult(true);
+    }
+
+    @Override
+    public void onKeepData(DialogFragment dialog) {
+        returnResult(true);
+    }
+
+    @Override
+    public void onCancel(DialogFragment dialog) {
+        returnResult(false);
+    }
+
+    @TargetApi(Build.VERSION_CODES.KITKAT)
+    private boolean resetData() {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {

[aurimas (slooooooooow), 2015/06/09 17:45:03]

What will happen on JB devices?

[Bernhard Bauer, 2015/06/15 17:07:29]

We will return an error. In practice, this shouldn't happen, as the use case for
this is L+.

+            return false;
+        }
+        ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
+        return am.clearApplicationUserData();
+    }
+
+    private void returnResult(boolean success) {
+        setResult(success ? Activity.RESULT_OK : Activity.RESULT_CANCELED);
+        finish();
+    }
+}