Add enable-sync-directory-operation to about:flags

This adds a flag to about:flags to enable/disable syncfs directory support.

BUG=238877

Review URL: https://chromiumcodereview.appspot.com/15026008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@199052 0039d316-1c4b-4281-b951-d872f2087c98

4 files changed, 21 insertions, 0 deletions

diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 2f68e34..da67923 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -7227,6 +7227,12 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_FLAGS_DEFAULT_TILE_HEIGHT_VENTI" desc="">
         1024
       </message>
+      <message name="IDS_FLAGS_ENABLE_SYNC_DIRECTORY_OPERATION_NAME" desc="Name of the flag to enable syncfs directory support.">
+        Enable Syncfs directory operation.
+      </message>
+      <message name="IDS_FLAGS_ENABLE_SYNC_DIRECTORY_OPERATION_DESCRIPTION" desc="Description of the flag to enable syncfs directory support.">
+        Enables directory support for sync filesystem.
+      </message>
 
       <!-- Crashes -->
       <message name="IDS_CRASHES_TITLE" desc="Title for the chrome://crashes page.">
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index f9291db..2fd8263 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -33,6 +33,7 @@
 #include "ui/gl/gl_switches.h"
 #include "ui/keyboard/keyboard_switches.h"
 #include "ui/surface/surface_switches.h"
+#include "webkit/fileapi/syncable/syncable_file_system_util.h"
 
 #if defined(ENABLE_MESSAGE_CENTER)
 #include "ui/message_center/message_center_switches.h"
@@ -1466,6 +1467,14 @@ const Experiment kExperiments[] = {
     kOsWin,
     SINGLE_VALUE_TYPE(switches::kAppsUseNativeFrame)
   },
+  {
+    "enable-sync-directory-operation",
+    IDS_FLAGS_ENABLE_SYNC_DIRECTORY_OPERATION_NAME,
+    IDS_FLAGS_ENABLE_SYNC_DIRECTORY_OPERATION_DESCRIPTION,
+    kOsAll,
+    SINGLE_VALUE_TYPE(
+        sync_file_system::GetFlagForSyncFileSystemDirectoryOperation())
+  },
 };
 
 const Experiment* experiments = kExperiments;
diff --git a/webkit/fileapi/syncable/syncable_file_system_util.cc b/webkit/fileapi/syncable/syncable_file_system_util.cc
index e785ba4..3dd28f4 100644
--- a/webkit/fileapi/syncable/syncable_file_system_util.cc
+++ b/webkit/fileapi/syncable/syncable_file_system_util.cc
@@ -29,6 +29,10 @@ bool is_directory_operation_enabled = false;
 
 }
 
+const char* GetFlagForSyncFileSystemDirectoryOperation() {
+  return kEnableSyncDirectoryOperation;
+}
+
 bool RegisterSyncableFileSystem(const std::string& service_name) {
   return ExternalMountPoints::GetSystemInstance()->RegisterFileSystem(
       service_name, fileapi::kFileSystemTypeSyncable, base::FilePath());
diff --git a/webkit/fileapi/syncable/syncable_file_system_util.h b/webkit/fileapi/syncable/syncable_file_system_util.h
index 12d4db6..52f52cc 100644
--- a/webkit/fileapi/syncable/syncable_file_system_util.h
+++ b/webkit/fileapi/syncable/syncable_file_system_util.h
@@ -19,6 +19,8 @@ class LocalFileSystemOperation;
 
 namespace sync_file_system {
 
+WEBKIT_STORAGE_EXPORT const char* GetFlagForSyncFileSystemDirectoryOperation();
+
 // Registers a syncable filesystem with the given |service_name|.
 WEBKIT_STORAGE_EXPORT bool RegisterSyncableFileSystem(
     const std::string& service_name);