[Files App] Only use the first matching file handler from each app.

chrome/browser/chromeos/file_manager/file_tasks.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/chromeos/file_manager/file_tasks.h"
 
 #include "apps/launcher.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
@@ skipping 395 matching lines @@
     if (profile->IsOffTheRecord() &&
         !extensions::util::IsIncognitoEnabled(extension->id(), profile))
       continue;
 
     typedef std::vector<const extensions::FileHandlerInfo*> FileHandlerList;
     FileHandlerList file_handlers =
         FindFileHandlersForFiles(*extension, path_mime_set);
     if (file_handlers.empty())
       continue;
 
-    for (FileHandlerList::iterator i = file_handlers.begin();
-         i != file_handlers.end(); ++i) {
-      std::string task_id = file_tasks::MakeTaskID(
-          extension->id(), file_tasks::TASK_TYPE_FILE_HANDLER, (*i)->id);
+    // Only show the first matching handler from each app.
+    const extensions::FileHandlerInfo* file_handler = file_handlers.front();
+    std::string task_id = file_tasks::MakeTaskID(
+        extension->id(), file_tasks::TASK_TYPE_FILE_HANDLER, file_handler->id);
 
-      GURL best_icon = extensions::ExtensionIconSource::GetIconURL(
-          extension,
-          drive::util::kPreferredIconSize,
-          ExtensionIconSet::MATCH_BIGGER,
-          false,  // grayscale
-          NULL);  // exists
+    GURL best_icon = extensions::ExtensionIconSource::GetIconURL(
+        extension,
+        drive::util::kPreferredIconSize,
+        ExtensionIconSet::MATCH_BIGGER,
+        false,  // grayscale
+        NULL);  // exists
 
-      result_list->push_back(FullTaskDescriptor(
-          TaskDescriptor(
-              extension->id(), file_tasks::TASK_TYPE_FILE_HANDLER, (*i)->id),
-          extension->name(),
-          best_icon,
-          false /* is_default */));
-    }
+    result_list->push_back(
+        FullTaskDescriptor(TaskDescriptor(extension->id(),
+                                          file_tasks::TASK_TYPE_FILE_HANDLER,
+                                          file_handler->id),
+                           extension->name(),
+                           best_icon,
+                           false /* is_default */));
   }
 }
 
 void FindFileBrowserHandlerTasks(
     Profile* profile,
     const std::vector<GURL>& file_urls,
     std::vector<FullTaskDescriptor>* result_list) {
   DCHECK(!file_urls.empty());
   DCHECK(result_list);
 
@@ skipping 96 matching lines @@
     DCHECK(!task->is_default());
     if (IsFallbackFileHandler(task->task_descriptor())) {
       task->set_is_default(true);
       return;
     }
   }
 }
 
 }  // namespace file_tasks
 }  // namespace file_manager