[cros] Define session_manager component with SessionManager base class

chrome/browser/browser_process_platform_part_chromeos.h

Index: chrome/browser/browser_process_platform_part_chromeos.h
diff --git a/chrome/browser/browser_process_platform_part_chromeos.h b/chrome/browser/browser_process_platform_part_chromeos.h
index e5c4b4648bf7c064b238fbfc1d257021d61ae6f6..8fe87aaadece65554bc423502cd90ffacd3f063c 100644
--- a/chrome/browser/browser_process_platform_part_chromeos.h
+++ b/chrome/browser/browser_process_platform_part_chromeos.h
@@ -10,6 +10,10 @@
 #include "base/threading/non_thread_safe.h"
 #include "chrome/browser/browser_process_platform_part_base.h"
 
+namespace base {
+class CommandLine;
+}
+
 namespace chromeos {
 class OomPriorityManager;
 class ProfileHelper;
@@ -26,6 +30,12 @@ class BrowserPolicyConnector;
 class BrowserPolicyConnectorChromeOS;
 }
 
+namespace session_manager {
+class SessionManager;
+}
+
+class Profile;
+
 class BrowserProcessPlatformPart : public BrowserProcessPlatformPartBase,
                                    public base::NonThreadSafe {
  public:
@@ -35,6 +45,16 @@ class BrowserProcessPlatformPart : public BrowserProcessPlatformPartBase,
   void InitializeAutomaticRebootManager();
   void ShutdownAutomaticRebootManager();
 
+  void InitializeSessionManager(const base::CommandLine& parsed_command_line,
+                                Profile* profile,
+                                bool is_running_test);
+  void ShutdownSessionManager();
+
+  // Returns the SessionManager instance that is used to initialize and
+  // start user sessions as well as responsible on launching pre-session UI like
+  // out-of-box or login.
+  virtual session_manager::SessionManager* SessionManager();
+
   // Returns the out-of-memory priority manager.
   // Virtual for testing (see TestingBrowserProcessPlatformPart).
   virtual chromeos::OomPriorityManager* oom_priority_manager();
@@ -50,7 +70,7 @@ class BrowserProcessPlatformPart : public BrowserProcessPlatformPartBase,
   policy::BrowserPolicyConnectorChromeOS* browser_policy_connector_chromeos();
 
   // Overridden from BrowserProcessPlatformPartBase:
-    virtual void StartTearDown() OVERRIDE;
+  virtual void StartTearDown() OVERRIDE;
 
   virtual scoped_ptr<policy::BrowserPolicyConnector>
       CreateBrowserPolicyConnector() OVERRIDE;
@@ -58,6 +78,8 @@ class BrowserProcessPlatformPart : public BrowserProcessPlatformPartBase,
  private:
   void CreateProfileHelper();
 
+  scoped_ptr<session_manager::SessionManager> session_manager_;
+
   bool created_profile_helper_;
   scoped_ptr<chromeos::ProfileHelper> profile_helper_;