ignore stale callbacks in conversation view

Bug: 6841015
Change-Id: I8f9669d69ecf9734a41c8ca1e99d4f9f357b3f37
diff --git a/src/com/android/mail/ui/ConversationViewFragment.java b/src/com/android/mail/ui/ConversationViewFragment.java
index 121fc01..8281817 100644
--- a/src/com/android/mail/ui/ConversationViewFragment.java
+++ b/src/com/android/mail/ui/ConversationViewFragment.java
@@ -719,6 +719,12 @@
 
         @Override
         public void onPageFinished(WebView view, String url) {
+            if (!mViewsCreated) {
+                LogUtils.i(LOG_TAG, "ignoring CVF.onPageFinished, fragment=%s",
+                        ConversationViewFragment.this);
+                return;
+            }
+
             LogUtils.i(LOG_TAG, "IN CVF.onPageFinished, url=%s fragment=%s", url,
                     ConversationViewFragment.this);