Change userid from a uint32_t to a string guid

content/public/browser/browser_context.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_
 #define CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 115 matching lines @@
   static void SaveSessionState(BrowserContext* browser_context);
 
   static void SetDownloadManagerForTesting(BrowserContext* browser_context,
                                            DownloadManager* download_manager);
 
   // Makes mojo aware of this BrowserContext, and assigns a user ID number to
   // it. Should be called for each BrowserContext created.
   static void Initialize(BrowserContext* browser_context,
                          const base::FilePath& path);
 
-  // Returns a randomized user ID number associated with this
-  // BrowserContext. This ID is not persistent across runs.
-  static uint32_t GetMojoUserIdFor(BrowserContext* browser_context);
+  // Returns a Mojo User ID associated with this BrowserContext. This ID is not
+  // persistent across runs. See mojo/shell/public/interfaces/connector.mojom.
+  static const std::string& GetMojoUserIdFor(BrowserContext* browser_context);
 
   ~BrowserContext() override;
 
   // Creates a delegate to initialize a HostZoomMap and persist its information.
   // This is called during creation of each StoragePartition.
   virtual scoped_ptr<ZoomLevelDelegate> CreateZoomLevelDelegate(
       const base::FilePath& partition_path) = 0;
 
   // Returns the path of the directory where this context's data is stored.
   virtual base::FilePath GetPath() const = 0;
@@ skipping 56 matching lines @@
   virtual PermissionManager* GetPermissionManager() = 0;
 
   // Returns the BackgroundSyncController associated with that context if any,
   // nullptr otherwise.
   virtual BackgroundSyncController* GetBackgroundSyncController() = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_BROWSER_CONTEXT_H_