Move MediaDeviceIDSalt from ProfileIOData to ProfileImpl.

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>
 #include <limits>
 #include <memory>
 #include <utility>
 #include <vector>
 
+#include "base/base64.h"
 #include "base/command_line.h"
 #include "base/guid.h"
 #include "base/lazy_instance.h"
+#include "base/logging.h"
 #include "base/macros.h"
 #include "base/rand_util.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "content/browser/blob_storage/chrome_blob_storage_context.h"
 #include "content/browser/download/download_manager_impl.h"
 #include "content/browser/indexed_db/indexed_db_context_impl.h"
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 #include "content/browser/push_messaging/push_messaging_router.h"
 #include "content/browser/storage_partition_impl_map.h"
@@ skipping 470 matching lines @@
 // static
 ServiceManagerConnection* BrowserContext::GetServiceManagerConnectionFor(
     BrowserContext* browser_context) {
   BrowserContextServiceManagerConnectionHolder* connection_holder =
       static_cast<BrowserContextServiceManagerConnectionHolder*>(
           browser_context->GetUserData(kServiceManagerConnection));
   return connection_holder ? connection_holder->service_manager_connection()
                            : nullptr;
 }
 
+BrowserContext::BrowserContext()
+    : media_device_id_salt_(CreateRandomMediaDeviceIDSalt()) {}
+
 BrowserContext::~BrowserContext() {
   CHECK(GetUserData(kMojoWasInitialized))
       << "Attempting to destroy a BrowserContext that never called "
       << "Initialize()";
 
   DCHECK(!GetUserData(kStoragePartitionMapKeyName))
       << "StoragePartitionMap is not shut down properly";
 
   RemoveBrowserContextFromUserIdMap(this);
 
   if (GetUserData(kDownloadManagerKeyName))
     GetDownloadManager(this)->Shutdown();
 }
 
 void BrowserContext::ShutdownStoragePartitions() {
   if (GetUserData(kStoragePartitionMapKeyName))
     RemoveUserData(kStoragePartitionMapKeyName);
 }
 
+std::string BrowserContext::GetMediaDeviceIDSalt() {
+  return media_device_id_salt_;
+}
+
+// static
+std::string BrowserContext::CreateRandomMediaDeviceIDSalt() {
+  std::string salt;
+  base::Base64Encode(base::RandBytesAsString(16), &salt);
+  DCHECK(!salt.empty());
+  return salt;
+}
+
 }  // namespace content