mediaview: Introduce ArcDocumentsProviderRoot.

chrome/browser/chromeos/BUILD.gn

Index: chrome/browser/chromeos/BUILD.gn
diff --git a/chrome/browser/chromeos/BUILD.gn b/chrome/browser/chromeos/BUILD.gn
index 6493533cbf672f55fb17f265d6d202ce63c7a646..085506cc81053d0255768aad589e00489c5b0008 100644
--- a/chrome/browser/chromeos/BUILD.gn
+++ b/chrome/browser/chromeos/BUILD.gn
@@ -247,6 +247,12 @@ source_set("chromeos") {
     "arc/fileapi/arc_documents_provider_async_file_util.h",
     "arc/fileapi/arc_documents_provider_backend_delegate.cc",
     "arc/fileapi/arc_documents_provider_backend_delegate.h",
+    "arc/fileapi/arc_documents_provider_root.cc",
+    "arc/fileapi/arc_documents_provider_root.h",
+    "arc/fileapi/arc_documents_provider_root_map.cc",
+    "arc/fileapi/arc_documents_provider_root_map.h",
+    "arc/fileapi/arc_documents_provider_util.cc",
+    "arc/fileapi/arc_documents_provider_util.h",
     "arc/fileapi/arc_file_system_instance_util.cc",
     "arc/fileapi/arc_file_system_instance_util.h",
     "arc/intent_helper/arc_external_protocol_dialog.cc",
@@ -1416,6 +1422,7 @@ source_set("unit_tests") {
     "arc/fileapi/arc_content_file_system_async_file_util_unittest.cc",
     "arc/fileapi/arc_content_file_system_file_stream_reader_unittest.cc",
     "arc/fileapi/arc_content_file_system_url_util_unittest.cc",
+    "arc/fileapi/arc_documents_provider_util_unittest.cc",
     "arc/intent_helper/arc_external_protocol_dialog_unittest.cc",
     "arc/intent_helper/arc_navigation_throttle_unittest.cc",
     "arc/optin/arc_terms_of_service_negotiator_unittest.cc",