views impl: hide top infobar arrow when omnibox popup shows

chrome/browser/ui/omnibox/omnibox_popup_model.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/omnibox/omnibox_popup_model.h"
 
 #include <algorithm>
 
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/autocomplete/autocomplete_match.h"
 #include "chrome/browser/extensions/api/omnibox/omnibox_api.h"
 #include "chrome/browser/profiles/profile.h"
 #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"
 #include "ui/gfx/rect.h"
 
 ///////////////////////////////////////////////////////////////////////////////
 // OmniboxPopupModel
 
 const size_t OmniboxPopupModel::kNoMatch = -1;
 
@@ skipping 184 matching lines @@
   // There had better not be a nonempty result set with no default match.
   CHECK((selected_line_ != kNoMatch) || result.empty());
   manually_selected_match_.Clear();
   selected_line_state_ = NORMAL;
   // If we're going to trim the window size to no longer include the hovered
   // line, turn hover off.  Practically, this shouldn't happen, but it
   // doesn't hurt to be defensive.
   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);
+}