mojo leveldb: Get profile and leveldb connected to DOMStorageContext.

content/browser/mojo/mojo_app_connection_impl.h

 // Copyright 2015 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_BROWSER_MOJO_MOJO_APP_CONNECTION_IMPL_H_
 #define CONTENT_BROWSER_MOJO_MOJO_APP_CONNECTION_IMPL_H_
 
 #include "base/macros.h"
 #include "content/public/browser/mojo_app_connection.h"
 #include "mojo/shell/public/interfaces/interface_provider.mojom.h"
 
 namespace content {
 
 // Implementation of the app connection mechanism provided to browser code.
 class MojoAppConnectionImpl : public MojoAppConnection {
  public:
-  MojoAppConnectionImpl(const std::string& name,
+  // Takes a BrowserContext and derives a mojo userid from it for this
+  // connection.
+  MojoAppConnectionImpl(const std::string& user_id,
+                        const std::string& name,
                         const std::string& requestor_name);
   ~MojoAppConnectionImpl() override;
 
  private:
   // MojoAppConnection:
   void GetInterface(const std::string& interface_name,
                     mojo::ScopedMessagePipeHandle handle) override;
 
   mojo::shell::mojom::InterfaceProviderPtr interfaces_;
 
   DISALLOW_COPY_AND_ASSIGN(MojoAppConnectionImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MOJO_MOJO_APP_CONNECTION_IMPL_H_