Stop fallback for empty local path in ui::SelectedFileInfo's constructor.

Previously ui::SelectedFileInfo's constructor has a fallback to use the file
path instead of an emtpy local path. But this fallback can assign non-native
paths like '/special/drive/xxx' to local_path variable when the file does not
have a snapshot.

The CL removes the fallback, and modify the default behavior of
FileSelectDialog::Lister so that it routes an empty local_path to file_path.

BUG=126902
TEST=manually

Review URL: https://codereview.chromium.org/666693004

Cr-Commit-Position: refs/heads/master@{#300628}

chrome/browser/chromeos/extensions/file_manager/private_api_util.cc

@@ -119,7 +119,10 @@ void GetSelectedFileInfoInternal(Profile* profile,
       // MTP, or provided file system), we should resolve the path.
       switch (params->local_path_option) {
         case NO_LOCAL_PATH_RESOLUTION:
-          break;  // No special handling needed.
+          // Pass empty local path.
+          params->selected_files.push_back(
+              ui::SelectedFileInfo(file_path, base::FilePath()));
+          break;
         case NEED_LOCAL_PATH_FOR_OPENING:
           GetFileNativeLocalPathForOpening(
               profile,
@@ -137,9 +140,10 @@ void GetSelectedFileInfoInternal(Profile* profile,
                          base::Passed(&params)));
           return;  // Remaining work is done in ContinueGetSelectedFileInfo.
       }
-    }
+    } else {
       params->selected_files.push_back(
-        ui::SelectedFileInfo(file_path, base::FilePath()));
+          ui::SelectedFileInfo(file_path, file_path));
+    }
   }
   params->callback.Run(params->selected_files);
 }

ui/shell_dialogs/select_file_dialog.cc

@@ -46,7 +46,10 @@ void SelectFileDialog::Listener::FileSelectedWithExtraInfo(
     int index,
     void* params) {
   // Most of the dialogs need actual local path, so default to it.
-  FileSelected(file.local_path, index, params);
+  // If local path is empty, use file_path instead.
+  FileSelected(file.local_path.empty() ? file.file_path : file.local_path,
+               index,
+               params);
 }
 
 void SelectFileDialog::Listener::MultiFilesSelectedWithExtraInfo(
@@ -54,7 +57,8 @@ void SelectFileDialog::Listener::MultiFilesSelectedWithExtraInfo(
     void* params) {
   std::vector<base::FilePath> file_paths;
   for (size_t i = 0; i < files.size(); ++i)
-    file_paths.push_back(files[i].local_path);
+    file_paths.push_back(files[i].local_path.empty() ? files[i].file_path
+                                                     : files[i].local_path);
 
   MultiFilesSelected(file_paths, params);
 }

ui/shell_dialogs/selected_file_info.cc

@@ -12,8 +12,6 @@ SelectedFileInfo::SelectedFileInfo(const base::FilePath& in_file_path,
                                    const base::FilePath& in_local_path)
     : file_path(in_file_path),
       local_path(in_local_path) {
-  if (local_path.empty())
-    local_path = file_path;
   display_name = in_file_path.BaseName().value();
 }
 

ui/shell_dialogs/selected_file_info.h

@@ -20,10 +20,9 @@ struct SHELL_DIALOGS_EXPORT SelectedFileInfo {
 
   // The actual local path to the selected file. This can be a snapshot file
   // with a human unreadable name like /blah/.d41d8cd98f00b204e9800998ecf8427e.
-  // |real_path| can differ from |file_path| for drive files (e.g.
+  // |local_path| can differ from |file_path| for drive files (e.g.
   // /drive_cache/temporary/d41d8cd98f00b204e9800998ecf8427e vs.
   // /special/drive/foo.txt).
-  // If not set, defaults to |file_path|.
   base::FilePath local_path;
 
   // This field is optional. The display name contains only the base name
@@ -41,4 +40,3 @@ struct SHELL_DIALOGS_EXPORT SelectedFileInfo {
 }  // namespace ui
 
 #endif  // UI_SHELL_DIALOGS_SELECTED_FILE_INFO_H_
-