(2nd try) Add a helper class that keeps per-profile information for FileSystem API

chrome/browser/profile_impl.cc

 // Copyright (c) 2010 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/profile_impl.h"
 
 #include "app/resource_bundle.h"
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/file_path.h"
@@ skipping 14 matching lines @@
 #include "chrome/browser/chrome_thread.h"
 #include "chrome/browser/dom_ui/ntp_resource_cache.h"
 #include "chrome/browser/download/download_manager.h"
 #include "chrome/browser/extensions/extension_devtools_manager.h"
 #include "chrome/browser/extensions/extension_error_reporter.h"
 #include "chrome/browser/extensions/extension_message_service.h"
 #include "chrome/browser/extensions/extension_process_manager.h"
 #include "chrome/browser/extensions/extensions_service.h"
 #include "chrome/browser/extensions/user_script_master.h"
 #include "chrome/browser/favicon_service.h"
+#include "chrome/browser/file_system/file_system_host_context.h"
 #include "chrome/browser/find_bar_state.h"
 #include "chrome/browser/geolocation/geolocation_content_settings_map.h"
 #include "chrome/browser/geolocation/geolocation_permission_context.h"
 #include "chrome/browser/history/history.h"
 #include "chrome/browser/history/top_sites.h"
 #include "chrome/browser/host_content_settings_map.h"
 #include "chrome/browser/host_zoom_map.h"
 #include "chrome/browser/in_process_webkit/webkit_context.h"
 #include "chrome/browser/net/chrome_url_request_context.h"
 #include "chrome/browser/net/gaia/token_service.h"
@@ skipping 927 matching lines @@
 }
 
 PersonalDataManager* ProfileImpl::GetPersonalDataManager() {
   if (!personal_data_manager_.get()) {
     personal_data_manager_ = new PersonalDataManager();
     personal_data_manager_->Init(this);
   }
   return personal_data_manager_.get();
 }
 
+FileSystemHostContext* ProfileImpl::GetFileSystemHostContext() {
+  if (!file_system_host_context_.get())
+    file_system_host_context_ = new FileSystemHostContext(
+        GetPath(), IsOffTheRecord());
+  DCHECK(file_system_host_context_.get());
+  return file_system_host_context_.get();
+}
+
 void ProfileImpl::InitThemes() {
   if (!created_theme_provider_) {
 #if defined(TOOLKIT_USES_GTK)
     theme_provider_.reset(new GtkThemeProvider);
 #else
     theme_provider_.reset(new BrowserThemeProvider);
 #endif
     theme_provider_->Init(this);
     created_theme_provider_ = true;
   }
@@ skipping 243 matching lines @@
 #if defined(OS_CHROMEOS)
 chromeos::ProxyConfigServiceImpl*
     ProfileImpl::GetChromeOSProxyConfigServiceImpl() {
   if (!chromeos_proxy_config_service_impl_) {
     chromeos_proxy_config_service_impl_ =
         new chromeos::ProxyConfigServiceImpl();
   }
   return chromeos_proxy_config_service_impl_;
 }
 #endif  // defined(OS_CHROMEOS)