Find-in-page UI would disappear if re-invoked while the close animation was...

Find-in-page UI would disappear if re-invoked while the close animation was progressing but not yet finished.

Make sure any close animation is finished and the drop-down bar state is consistent before showing.

Bug: 790889
Change-Id: I5a8edbfe398d048ef226ea849c4c9d285b1ec564
Reviewed-on: https://chromium-review.googlesource.com/893213Reviewed-by: Bret Sepulveda <bsep@chromium.org>
Commit-Queue: Allen Bauer <kylixrd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#533023}

chrome/browser/ui/views/dropdown_bar_host.cc

@@ -86,6 +86,12 @@ void DropdownBarHost::Show(bool animate) {
 
   SetDialogPosition(GetDialogPosition(gfx::Rect()));
 
+  // If we're in the middle of a close animation, stop it and skip to the end.
+  // This ensures that the state is consistent and prepared to show the drop-
+  // down bar.
+  if (animation_->IsClosing())
+    StopAnimation();
+
   host_->Show();
 
   bool was_visible = is_visible_;