Switch to mojo localstorage backend by default.

content/browser/browser_context.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 "content/public/browser/browser_context.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 461 matching lines @@
         new BrowserContextServiceManagerConnectionHolder(
             std::move(service_request));
     browser_context->SetUserData(kServiceManagerConnection,
                                  base::WrapUnique(connection_holder));
 
     ServiceManagerConnection* connection =
         connection_holder->service_manager_connection();
 
     // New embedded service factories should be added to |connection| here.
 
-    if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-            switches::kMojoLocalStorage)) {
+    if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
+            switches::kDisableMojoLocalStorage)) {
       ServiceInfo info;
       // TODO(mek): Use sequenced task runner rather than single thread task
       // runner when mojo supports that (http://crbug.com/678155).
       info.factory = base::Bind(
           &file::CreateFileService,
           base::CreateSingleThreadTaskRunnerWithTraits(
               {base::MayBlock(), base::TaskShutdownBehavior::BLOCK_SHUTDOWN}),
           BrowserThread::GetTaskRunnerForThread(BrowserThread::DB));
       connection->AddEmbeddedService(file::mojom::kServiceName, info);
     }
@@ skipping 74 matching lines @@
 
 // static
 std::string BrowserContext::CreateRandomMediaDeviceIDSalt() {
   std::string salt;
   base::Base64Encode(base::RandBytesAsString(16), &salt);
   DCHECK(!salt.empty());
   return salt;
 }
 
 }  // namespace content