Fix segmentation fault requesting null change_password_button

The if statement for change_password_button was
reversed and used the object when it was null.

Bug: 1068396
Change-Id: I13fce75f5aaeee0749a59de08bd439362d93b4ed
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2145677
Auto-Submit: Bettina Dea <bdea@chromium.org>
Reviewed-by: Daniel Rubery <drubery@chromium.org>
Reviewed-by: Mustafa Emre Acer <meacer@chromium.org>
Reviewed-by: Varun Khaneja <vakh@chromium.org>
Commit-Queue: Daniel Rubery <drubery@chromium.org>
Commit-Queue: Mustafa Emre Acer <meacer@chromium.org>
Commit-Queue: Varun Khaneja <vakh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#758319}

chrome/browser/ui/views/page_info/page_info_bubble_view.cc

@@ -338,8 +338,8 @@ void BubbleHeaderView::AddPasswordReuseButtons(bool is_saved_password) {
   int kSpacingBetweenButtons = 8;
   int change_password_button_size =
       change_password_button
-          ? 0
-          : change_password_button->CalculatePreferredSize().width();
+          ? change_password_button->CalculatePreferredSize().width()
+          : 0;
 
   // If these two buttons cannot fit into a single line, stack them vertically.
   bool can_fit_in_one_line =