[Files.app] Hide video-player related task menu according to condition

chrome/browser/chromeos/file_manager/file_tasks.cc

Index: chrome/browser/chromeos/file_manager/file_tasks.cc
diff --git a/chrome/browser/chromeos/file_manager/file_tasks.cc b/chrome/browser/chromeos/file_manager/file_tasks.cc
index 9572b954c89f3ec5e8649f55737d89eaeb37bd38..720c4015fff3bce5f317b3021c557f3a4c73dc22 100644
--- a/chrome/browser/chromeos/file_manager/file_tasks.cc
+++ b/chrome/browser/chromeos/file_manager/file_tasks.cc
@@ -107,6 +107,48 @@ void KeepOnlyFileManagerInternalTasks(std::vector<FullTaskDescriptor>* tasks) {
   tasks->swap(filtered);
 }
 
+// Finds a task that matches |app_id| and |action_id| from |task_list|.
+// Returns a mutable iterator to the handler if found. Returns task_list->end()
+// if not found.
+std::vector<FullTaskDescriptor>::iterator
+FindTaskForAppIdAndActionId(
+    std::vector<FullTaskDescriptor>* task_list,
+    const std::string& app_id,
+    const std::string& action_id) {
+  DCHECK(task_list);
+
+  std::vector<FullTaskDescriptor>::iterator iter = task_list->begin();
+  while (iter != task_list->end() &&
+         !(iter->task_descriptor().app_id == app_id &&
+           iter->task_descriptor().action_id == action_id)) {
+    ++iter;
+  }
+  return iter;
+}
+
+// Chooses a suitable video handeler and removes other internal video hander.
+// Both "watch" and "gallery-video" actions are applicable which means that the
+// selection is all videos. Showing them both is confusing, so we only keep
+// the one that makes more sense ("watch" for single selection, "gallery"
+// for multiple selection).
+void ChooseSuitableVideoHandler(
+    const std::vector<GURL>& file_urls,
+    std::vector<FullTaskDescriptor>* task_list) {
+  std::vector<FullTaskDescriptor>::iterator video_player_iter =
+      FindTaskForAppIdAndActionId(task_list, kVideoPlayerAppId, "video");
+  std::vector<FullTaskDescriptor>::iterator gallery_video_iter =
+      FindTaskForAppIdAndActionId(
+          task_list, kFileManagerAppId, "gallery-video");
+
+  if (video_player_iter != task_list->end() &&
+      gallery_video_iter != task_list->end()) {
+    if (file_urls.size() == 1)
+      task_list->erase(gallery_video_iter);
+    else
+      task_list->erase(video_player_iter);
+  }
+}
+
 }  // namespace
 
 FullTaskDescriptor::FullTaskDescriptor(
@@ -467,6 +509,8 @@ void FindAllTypesOfTasks(
   if (ContainsGoogleDocument(path_mime_set))
     KeepOnlyFileManagerInternalTasks(result_list);
 
+  ChooseSuitableVideoHandler(file_urls, result_list);
+
   ChooseAndSetDefaultTask(*profile->GetPrefs(), path_mime_set, result_list);
 }