Move //chrome/browser/{chromeos => ash}/file_manager [2/2]

Remaining files are moved to //chrome/browser/ash/file_manager.

This CL is part of the Chrome OS source code directory migration:
https://docs.google.com/document/d/1g-98HpzA8XcoGBWUv1gQNr4rbnD5yfvbtYZyPDDbkaE.

Change-Id: I92f71f116df4a76b2aab5db0261b5e4e374bbead
Bug: 1164001
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2974040
Reviewed-by: Hidehiko Abe <[email protected]>
Reviewed-by: Nancy Wang <[email protected]>
Owners-Override: Hidehiko Abe <[email protected]>
Commit-Queue: Yeunjoo Choi <[email protected]>
Cr-Commit-Position: refs/heads/master@{#898798}
diff --git a/chrome/browser/platform_util_unittest.cc b/chrome/browser/platform_util_unittest.cc
index 9ebcb18..fa3b5bf1 100644
--- a/chrome/browser/platform_util_unittest.cc
+++ b/chrome/browser/platform_util_unittest.cc
@@ -20,8 +20,8 @@
 #if BUILDFLAG(IS_CHROMEOS_ASH)
 #include "base/json/json_string_value_serializer.h"
 #include "base/values.h"
+#include "chrome/browser/ash/file_manager/app_id.h"
 #include "chrome/browser/chrome_content_browser_client.h"
-#include "chrome/browser/chromeos/file_manager/app_id.h"
 #include "chrome/browser/chromeos/fileapi/file_system_backend.h"
 #include "chrome/browser/chromeos/fileapi/file_system_backend_delegate.h"
 #include "chrome/browser/extensions/extension_special_storage_policy.h"