[SyncFS] Drop manual conflict resolution policy support.

chrome/browser/extensions/api/sync_file_system/sync_file_system_api.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/api/sync_file_system/sync_file_system_api.h"
 
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 327 matching lines @@
   info.quota_bytes = quota;
   results_ = api::sync_file_system::GetUsageAndQuota::Results::Create(info);
   SendResponse(true);
 }
 
 bool SyncFileSystemSetConflictResolutionPolicyFunction::RunSync() {
   std::string policy_string;
   EXTENSION_FUNCTION_VALIDATE(args_->GetString(0, &policy_string));
   ConflictResolutionPolicy policy = ExtensionEnumToConflictResolutionPolicy(
       api::sync_file_system::ParseConflictResolutionPolicy(policy_string));
-  if (policy == sync_file_system::CONFLICT_RESOLUTION_POLICY_UNKNOWN) {
+  if (policy != sync_file_system::CONFLICT_RESOLUTION_POLICY_LAST_WRITE_WIN) {
     SetError(base::StringPrintf(kUnsupportedConflictResolutionPolicy,
                                 policy_string.c_str()));
     return false;
   }
-  sync_file_system::SyncFileSystemService* service =
-      GetSyncFileSystemService(GetProfile());
-  DCHECK(service);
-  SyncStatusCode status = service->SetConflictResolutionPolicy(
-      source_url().GetOrigin(), policy);
-  if (status != sync_file_system::SYNC_STATUS_OK) {
-    SetError(ErrorToString(status));
-    return false;
-  }
   return true;
 }
 
 bool SyncFileSystemGetConflictResolutionPolicyFunction::RunSync() {
-  sync_file_system::SyncFileSystemService* service =
-      GetSyncFileSystemService(GetProfile());
-  DCHECK(service);
-  api::sync_file_system::ConflictResolutionPolicy policy =
-      ConflictResolutionPolicyToExtensionEnum(
-          service->GetConflictResolutionPolicy(source_url().GetOrigin()));
   SetResult(new base::StringValue(
-          api::sync_file_system::ToString(policy)));
+      api::sync_file_system::ToString(
+          api::sync_file_system::CONFLICT_RESOLUTION_POLICY_LAST_WRITE_WIN)));
   return true;
 }
 
 bool SyncFileSystemGetServiceStatusFunction::RunSync() {
   sync_file_system::SyncFileSystemService* service =
       GetSyncFileSystemService(GetProfile());
   results_ = api::sync_file_system::GetServiceStatus::Results::Create(
       SyncServiceStateToExtensionEnum(service->GetSyncServiceState()));
   return true;
 }
 
 }  // namespace extensions