[File Manager] Support HiDPI images in action picker and default action picker

chrome/browser/resources/file_manager/js/mock_chrome.js

Index: chrome/browser/resources/file_manager/js/mock_chrome.js
diff --git a/chrome/browser/resources/file_manager/js/mock_chrome.js b/chrome/browser/resources/file_manager/js/mock_chrome.js
index 5f6cd7ceecaafbbd7033f27a4032dcf88acc78a1..9407b42e45f8a81c4200162bfba1f6f6699336eb 100644
--- a/chrome/browser/resources/file_manager/js/mock_chrome.js
+++ b/chrome/browser/resources/file_manager/js/mock_chrome.js
@@ -152,7 +152,7 @@ chrome.fileBrowserPrivate = {
         taskId: 'fake-extension-id|fake-item',
         title: 'External action',
         regexp: /\.(bmp|gif|jpe?g|png|webp|3gp|avi|m4v|mov|mp4|mpeg4?|mpg4?|ogm|ogv|ogx|webm)$/i,
-        iconUrl: 'images/icon16.png'
+        iconType: 'generic'

[Dmitry Zvorygin, 2012/07/20 16:13:42]

You don't use task.iconType in code currently, and task.iconUrl doesn't work at
all according to comment 
" file_browser.js:68
// TODO(serya): This hack needed until task.iconUrl is working
//             (see GetFileTasksFileBrowserFunction::RunImpl).
"

What was this change made for?

       },
       {
         taskId: extensionId + '|view-in-browser',
@@ -479,6 +479,9 @@ chrome.fileBrowserPrivate = {
       ACTION_LISTEN: 'Listen',
       INSTALL_CRX: 'Open',
 
+      CHANGE_DEFAULT_MENU_ITEM: 'Change default...',
+      CHANGE_DEFAULT_CAPTION: 'Choose the default app for $1 files:',
+
       GALLERY_EDIT: 'Edit',
       GALLERY_SHARE: 'Share',
       GALLERY_AUTOFIX: 'Auto-fix',
@@ -631,6 +634,7 @@ chrome.fileBrowserPrivate = {
       IMAGE_FILE_TYPE: '$1 image',
       VIDEO_FILE_TYPE: '$1 video',
       AUDIO_FILE_TYPE: '$1 audio',
+      GENERIC_FILE_TYPE: '$1 file',
       HTML_DOCUMENT_FILE_TYPE: 'HTML document',
       ZIP_ARCHIVE_FILE_TYPE: 'Zip archive',
       RAR_ARCHIVE_FILE_TYPE: 'RAR archive',
@@ -643,6 +647,7 @@ chrome.fileBrowserPrivate = {
       POWERPOINT_PRESENTATION_FILE_TYPE: 'PowerPoint presentation',
       EXCEL_FILE_TYPE: 'Excel spreadsheet',
 
+      SEARCH_TEXT_LABEL: 'Search',
       SEARCH_NO_MATCHING_FILES: 'No files match <b>"$1"</b>',
 
       TIME_TODAY: 'Today, $1',