views impl: hide top infobar arrow when omnibox popup shows

chrome/browser/ui/omnibox/omnibox_popup_model.cc

Index: chrome/browser/ui/omnibox/omnibox_popup_model.cc
diff --git a/chrome/browser/ui/omnibox/omnibox_popup_model.cc b/chrome/browser/ui/omnibox/omnibox_popup_model.cc
index 930a0a63dd81b3e0ef52280f32449129a7cc51ec..30d182594917a0c39097708ab91faa4d49d05fbe 100644
--- a/chrome/browser/ui/omnibox/omnibox_popup_model.cc
+++ b/chrome/browser/ui/omnibox/omnibox_popup_model.cc
@@ -14,6 +14,7 @@
 #include "chrome/browser/search_engines/template_url.h"
 #include "chrome/browser/search_engines/template_url_service.h"
 #include "chrome/browser/search_engines/template_url_service_factory.h"
+#include "chrome/browser/ui/omnibox/omnibox_popup_model_observer.h"
 #include "chrome/browser/ui/omnibox/omnibox_popup_view.h"
 #include "third_party/icu/public/common/unicode/ubidi.h"
 #include "ui/gfx/image/image.h"
@@ -218,5 +219,19 @@ void OmniboxPopupModel::OnResultChanged() {
   if ((hovered_line_ != kNoMatch) && (result.size() <= hovered_line_))
     SetHoveredLine(kNoMatch);
 
+  bool popup_was_open = view_->IsOpen();
   view_->UpdatePopupAppearance();
+  // If popup has just been shown or hidden, notify observers.
+  if (view_->IsOpen() != popup_was_open) {
+    FOR_EACH_OBSERVER(OmniboxPopupModelObserver, observers_,
+                      OnOmniboxPopupShownOrHidden());
+  }
+}
+
+void OmniboxPopupModel::AddObserver(OmniboxPopupModelObserver* observer) {
+  observers_.AddObserver(observer);
+}
+
+void OmniboxPopupModel::RemoveObserver(OmniboxPopupModelObserver* observer) {
+  observers_.RemoveObserver(observer);
 }