am 71fdc400: Merge "Fix folder & account name not showing on back" into jb-ub-mail-ur9

* commit '71fdc400047182200d8e7eeac582c8f9d7241a3b':
  Fix folder & account name not showing on back
diff --git a/src/com/android/mail/browse/ConversationPagerController.java b/src/com/android/mail/browse/ConversationPagerController.java
index 21cf6b9..ab81016 100644
--- a/src/com/android/mail/browse/ConversationPagerController.java
+++ b/src/com/android/mail/browse/ConversationPagerController.java
@@ -157,7 +157,7 @@
             mPager.setVisibility(View.GONE);
         }
 
-        mSubjectDisplayChanger.clearSubject();
+        mSubjectDisplayChanger.clearSubjectAndUpdate();
 
         LogUtils.d(LOG_TAG, "IN CPC.hide, clearing adapter and unregistering list observer");
         mPager.setAdapter(null);
diff --git a/src/com/android/mail/ui/MailActionBarView.java b/src/com/android/mail/ui/MailActionBarView.java
index 9e94d33..55066bd 100644
--- a/src/com/android/mail/ui/MailActionBarView.java
+++ b/src/com/android/mail/ui/MailActionBarView.java
@@ -655,14 +655,14 @@
     }
 
     @Override
-    public void clearSubject() {
+    public void clearSubjectAndUpdate() {
         if (!mShowConversationSubject) {
             return;
         }
-
-        mActionBar.setTitle(null);
-        mActionBar.setSubtitle(null);
+        // Wipe subject view text
         mSubjectView.setText(null);
+        // Set folder and account as title and subtitle
+        setFolderAndAccount();
     }
 
     @Override
diff --git a/src/com/android/mail/ui/SubjectDisplayChanger.java b/src/com/android/mail/ui/SubjectDisplayChanger.java
index 29ccef5..6a19c9a 100644
--- a/src/com/android/mail/ui/SubjectDisplayChanger.java
+++ b/src/com/android/mail/ui/SubjectDisplayChanger.java
@@ -31,9 +31,10 @@
     void setSubject(String subject);
 
     /**
-     * Clear the subject display.
+     * Clear the subject display and update the action bar to display the
+     * folder/account.
      */
-    void clearSubject();
+    void clearSubjectAndUpdate();
 
     /**
      * Fits the subject text into the view that will display it, and returns any text that