Update policy backend and testserver for the newest policy protocol

chrome/browser/policy/cloud_policy_identity_strategy.h

Index: chrome/browser/policy/cloud_policy_identity_strategy.h
diff --git a/chrome/browser/policy/cloud_policy_identity_strategy.h b/chrome/browser/policy/cloud_policy_identity_strategy.h
index 1ecf8408e293f4ce27bc43dfbede7b35a5b6641a..1b4db766fa478ec2233e944664aa176e201a9843 100644
--- a/chrome/browser/policy/cloud_policy_identity_strategy.h
+++ b/chrome/browser/policy/cloud_policy_identity_strategy.h
@@ -9,9 +9,12 @@
 #include <string>
 
 #include "base/observer_list.h"
+#include "chrome/browser/policy/proto/device_management_backend.pb.h"
 
 namespace policy {
 
+namespace em = enterprise_management;
+
 // Manages a device management token, i.e. an identifier that represents a
 // registration with the device management service, and the associated
 // credentials. Responsibilities include storing and loading the token from
@@ -41,9 +44,22 @@ class CloudPolicyIdentityStrategy {
   // if the device token is currently unavailable.
   virtual std::string GetDeviceToken() = 0;
 
-  // Returns the device ID for this device.
+  // Returns the device ID for this device. This is a unique identifier that is
+  // randomly generated at registration time on the client side. It always has
+  // to be sent along with the device token to the server.
   virtual std::string GetDeviceID() = 0;
 
+  // Returns physical machine ID for this device.
+  virtual std::string GetMachineID() = 0;
+
+  // Returns the policy type to be used for registering at the device management
+  // server.
+  virtual em::DeviceRegisterRequest_Type GetPolicyRegisterType() = 0;
+
+  // Returns the policy type to be used for requesting policies from the device
+  // management server.
+  virtual std::string GetPolicyType() = 0;
+
   // Retrieves authentication credentials to use when talking to the device
   // management service. Returns true if the data is available and writes the
   // values to the provided pointers.