Make some updates to extension iconography.

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 <stddef.h>
 
 #include <map>
 
@@ skipping 485 matching lines @@
     }
 
     for (const auto& entry : handlers_for_entries) {
       const extensions::FileHandlerInfo* handler = entry.second.first;
       std::string task_id = file_tasks::MakeTaskID(
           extension->id(), file_tasks::TASK_TYPE_FILE_HANDLER, handler->id);
 
       GURL best_icon = extensions::ExtensionIconSource::GetIconURL(
           extension, drive::util::kPreferredIconSize,
           ExtensionIconSet::MATCH_BIGGER,
-          false,  // grayscale
-          NULL);  // exists
+          false);  // exists

[Devlin, 2016/12/15 17:14:40]

The remaining bool is grayscale, not exists, right?

[Evan Stade, 2016/12/15 23:49:02]

Done.

 
       // If file handler doesn't match as good match, regards it as generic file
       // handler.
       const bool is_generic_file_handler =
           !IsGoodMatchFileHandler(*handler, entries);
       Verb verb;
       if (handler->verb == extensions::file_handler_verbs::kAddTo) {
         verb = Verb::VERB_ADD_TO;
       } else if (handler->verb == extensions::file_handler_verbs::kPackWith) {
         verb = Verb::VERB_PACK_WITH;
@@ skipping 34 matching lines @@
        iter != common_tasks.end();
        ++iter) {
     const FileBrowserHandler* handler = *iter;
     const std::string extension_id = handler->extension_id();
     const Extension* extension = enabled_extensions.GetByID(extension_id);
     DCHECK(extension);
 
     // TODO(zelidrag): Figure out how to expose icon URL that task defined in
     // manifest instead of the default extension icon.
     const GURL icon_url = extensions::ExtensionIconSource::GetIconURL(
-        extension,
-        extension_misc::EXTENSION_ICON_BITTY,
+        extension, extension_misc::EXTENSION_ICON_BITTY,
         ExtensionIconSet::MATCH_BIGGER,
-        false,  // grayscale
-        NULL);  // exists
+        false);  // exists
 
     result_list->push_back(FullTaskDescriptor(
         TaskDescriptor(extension_id, file_tasks::TASK_TYPE_FILE_BROWSER_HANDLER,
                        handler->id()),
         handler->title(), Verb::VERB_NONE /* no verb for FileBrowserHandler */,
         icon_url, false /* is_default */, false /* is_generic_file_handler */));
   }
 }
 
 void FindExtensionAndAppTasks(
@@ skipping 66 matching lines @@
     DCHECK(!task->is_default());
     if (IsFallbackFileHandler(task->task_descriptor())) {
       task->set_is_default(true);
       return;
     }
   }
 }
 
 }  // namespace file_tasks
 }  // namespace file_manager