Move MyFiles translation to //ui/chromeos/

This allows the string to be shared between Files app and ARC++.

Bug: b:123362537
Change-Id: I9aedc65e4799ba1363e1c6981459ab25a08ce303
Reviewed-on: https://chromium-review.googlesource.com/c/1476887Reviewed-by: Dan Erat <derat@chromium.org>
Reviewed-by: Noel Gordon <noel@chromium.org>
Reviewed-by: Sam McNally <sammc@chromium.org>
Commit-Queue: Luciano Pacheco <lucmult@chromium.org>
Auto-Submit: Luciano Pacheco <lucmult@chromium.org>
Cr-Commit-Position: refs/heads/master@{#635801}

chrome/app/file_manager_strings.grdp

@@ -65,9 +65,6 @@
   <message name="IDS_FILE_BROWSER_LINUX_FILES_ROOT_LABEL" desc="A label for the 'Linux files' root which shows crostini files. Use sentence case.">
     Linux files
   </message>
-  <message name="IDS_FILE_BROWSER_MY_FILES_ROOT_LABEL" desc="A label for the 'My files' root which is parent of Downloads, Linux and Android files. Use sentence case.">
-    My files
-  </message>
   <message name="IDS_FILE_BROWSER_MEDIA_VIEW_IMAGES_ROOT_LABEL" desc="A label for the 'Images' root of media views.">
     Images
   </message>

chrome/browser/chromeos/file_manager/file_manager_string_util.cc

@@ -12,6 +12,7 @@
 #include "components/strings/grit/components_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/webui/web_ui_util.h"
+#include "ui/chromeos/strings/grit/ui_chromeos_strings.h"
 #include "ui/strings/grit/ui_strings.h"
 
 namespace {

ui/chromeos/ui_chromeos_strings.grd

@@ -1096,6 +1096,11 @@
       <message name="IDS_IME_NAME_TRANSLITERATION_UR" desc="The input method name shows in system tray menu. Please translate only for 'transliteration'.">
         Transliteration (salam &#x2190; &#x0633;&#x0644;&#x0627;&#x0645;)
       </message>
+
+      <!-- Strings shared between ARC++ (//components/arc) and Files app (//chrome/browser/chromeos/file_manager)  -->
+      <message name="IDS_FILE_BROWSER_MY_FILES_ROOT_LABEL" desc="A label for the 'My files' root which is parent of Downloads, Linux and Android files. Use sentence case.">
+        My files
+      </message>
     </messages>
   </release>
 </grit>

ui/chromeos/ui_chromeos_strings_grd/IDS_FILE_BROWSER_MY_FILES_ROOT_LABEL.png.sha1

+ee9bd055cf1f7c484fcc2a8e4c555fefa372daad
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