Check if Fragment is attached in onClick

chrome/android/java/src/org/chromium/chrome/browser/firstrun/ToSAndUMAFirstRunFragment.java

Index: chrome/android/java/src/org/chromium/chrome/browser/firstrun/ToSAndUMAFirstRunFragment.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/firstrun/ToSAndUMAFirstRunFragment.java b/chrome/android/java/src/org/chromium/chrome/browser/firstrun/ToSAndUMAFirstRunFragment.java
index 368d6a5a5a684bf93425fc7231fad22b0a142ace..9ad76f20f2924a51fa36c81e6fd1a8a3491a5b09 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/firstrun/ToSAndUMAFirstRunFragment.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/firstrun/ToSAndUMAFirstRunFragment.java
@@ -67,6 +67,7 @@ public class ToSAndUMAFirstRunFragment extends FirstRunPage {
         ClickableSpan clickableTermsSpan = new ClickableSpan() {
             @Override
             public void onClick(View widget) {
+                if (!isAdded()) return;
                 getPageDelegate().showEmbedContentViewActivity(R.string.terms_of_service_title,
                         R.string.chrome_terms_of_service_url);
             }
@@ -75,6 +76,7 @@ public class ToSAndUMAFirstRunFragment extends FirstRunPage {
         ClickableSpan clickablePrivacySpan = new ClickableSpan() {
             @Override
             public void onClick(View widget) {
+                if (!isAdded()) return;
                 getPageDelegate().showEmbedContentViewActivity(R.string.privacy_notice_title,
                         R.string.chrome_privacy_notice_url);
             }