Implementing answer card hover highlight.

ui/app_list/search_result.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 "ui/app_list/search_result.h"
 
 #include <map>
 
 #include "ui/app_list/app_list_constants.h"
 #include "ui/app_list/search/tokenized_string.h"
@@ skipping 39 matching lines @@
   for (auto& observer : observers_)
     observer.OnIconChanged();
 }
 
 void SearchResult::SetBadgeIcon(const gfx::ImageSkia& badge_icon) {
   badge_icon_ = badge_icon;
   for (auto& observer : observers_)
     observer.OnBadgeIconChanged();
 }
 
+void SearchResult::SetIsMouseInView(bool mouse_is_inside) {
+  mouse_is_in_view_ = mouse_is_inside;
+  for (auto& observer : observers_)
+    observer.OnViewHoverStateChanged();
+}
+
 void SearchResult::SetActions(const Actions& sets) {
   actions_ = sets;
   for (auto& observer : observers_)
     observer.OnActionsChanged();
 }
 
 void SearchResult::SetIsInstalling(bool is_installing) {
   if (is_installing_ == is_installing)
     return;
 
@@ skipping 88 matching lines @@
   }
 
   // Insert the delimiters (in reverse order, to preserve indices).
   for (auto it = inserts.rbegin(); it != inserts.rend(); ++it)
     result.insert(it->first, it->second);
 
   return result;
 }
 
 }  // namespace app_list