Implemented consumer management unenrollment.

chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.h

Index: chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.h
diff --git a/chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.h b/chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.h
index f3f2ca2809ecd59d701b12b7863ba5c8b6aab1e8..074a077756b2e32f325d92af2f5cf08bba914f09 100644
--- a/chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.h
+++ b/chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.h
@@ -9,6 +9,7 @@
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/callback_forward.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ -41,6 +42,8 @@ class DeviceCloudPolicyManagerChromeOS : public CloudPolicyManager {
    public:
     // Invoked when the device cloud policy manager connects.
     virtual void OnDeviceCloudPolicyManagerConnected() = 0;
+    // Invoked when the device cloud policy manager is disconnected.

[bartfab (slow), 2014/11/28 13:25:18]

Nit: s/is disconnected/disconnects/

[davidyu, 2014/12/01 17:05:22]

Done.

+    virtual void OnDeviceCloudPolicyManagerDisconnected() = 0;
   };
 
   // |task_runner| is the runner for policy refresh tasks.
@@ -86,6 +89,13 @@ class DeviceCloudPolicyManagerChromeOS : public CloudPolicyManager {
                        scoped_ptr<CloudPolicyClient::StatusProvider>
                            device_status_provider);
 
+  // Sends the unregister request. |callback| is invoked with a boolean
+  // parameter indicating the result when done.
+  virtual void Unregister(const base::Callback<void(bool)>& callback);

[bartfab (slow), 2014/11/28 13:25:18]

Nit: If you define a type for this callback, the fake implementation will be
able to reference it instead of repeating the whole |const
base::Callback<void(bool)>|.

[davidyu, 2014/12/01 17:05:22]

Done.

+
+  // Disconnects the manager.
+  virtual void Disconnect();
+
   DeviceCloudPolicyStoreChromeOS* device_store() {
     return device_store_.get();
   }
@@ -98,6 +108,7 @@ class DeviceCloudPolicyManagerChromeOS : public CloudPolicyManager {
   void InitializeRequisition();
 
   void NotifyConnected();
+  void NotifyDisconnected();
 
   // Points to the same object as the base CloudPolicyManager::store(), but with
   // actual device policy specific type.