Add DeviceADPolicyManager to provide AD policy.

chrome/browser/chromeos/settings/session_manager_operation.h

Index: chrome/browser/chromeos/settings/session_manager_operation.h
diff --git a/chrome/browser/chromeos/settings/session_manager_operation.h b/chrome/browser/chromeos/settings/session_manager_operation.h
index 1dd8cd4de0527520feabe881a7988b99fe539963..23f9499cf60c54a7d818da115fe47bc4ae9b7732 100644
--- a/chrome/browser/chromeos/settings/session_manager_operation.h
+++ b/chrome/browser/chromeos/settings/session_manager_operation.h
@@ -64,10 +64,6 @@ class SessionManagerOperation {
   // Whether the load operation is underway.
   bool is_loading() const { return is_loading_; }
 
-  void set_force_key_load(bool force_key_load) {
-    force_key_load_ = force_key_load;
-  }
-
  protected:
   // Runs the operation. The result is reported through |callback_|.
   virtual void Run() = 0;
@@ -86,6 +82,12 @@ class SessionManagerOperation {
     return session_manager_client_;
   }
 
+  // Whether to verify the loaded policy's signature against |public_key_|.
+  // (Active Directory policy has no signature that could be verified.)
+  bool verify_signature_ = true;
+
+  bool force_key_load_ = false;
+
  private:
   // Loads the owner key from disk. Must be run on a thread that can do I/O.
   static scoped_refptr<ownership::PublicKey> LoadPublicKey(
@@ -105,15 +107,14 @@ class SessionManagerOperation {
   // Extracts status and device settings from the validator and reports them.
   void ReportValidatorStatus(policy::DeviceCloudPolicyValidator* validator);
 
-  SessionManagerClient* session_manager_client_;
+  SessionManagerClient* session_manager_client_ = nullptr;
   scoped_refptr<ownership::OwnerKeyUtil> owner_key_util_;
 
   Callback callback_;
 
   scoped_refptr<ownership::PublicKey> public_key_;
-  bool force_key_load_;
 
-  bool is_loading_;
+  bool is_loading_ = false;
   std::unique_ptr<enterprise_management::PolicyData> policy_data_;
   std::unique_ptr<enterprise_management::ChromeDeviceSettingsProto>
       device_settings_;
@@ -128,7 +129,9 @@ class SessionManagerOperation {
 class LoadSettingsOperation : public SessionManagerOperation {
  public:
   // Creates a new load operation.
-  explicit LoadSettingsOperation(const Callback& callback);
+  LoadSettingsOperation(bool force_key_load,
+                        bool verify_signature,
+                        const Callback& callback);
   ~LoadSettingsOperation() override;
 
  protected: