chromeos: Add power management policy prefs.

chromeos/dbus/power_manager_client.h

Index: chromeos/dbus/power_manager_client.h
diff --git a/chromeos/dbus/power_manager_client.h b/chromeos/dbus/power_manager_client.h
index 265001fb4e1a3a5392cac3cba6d56c1c169292b3..3accbadb713a6139ddd27b93f9f6682c527e0a3e 100644
--- a/chromeos/dbus/power_manager_client.h
+++ b/chromeos/dbus/power_manager_client.h
@@ -19,6 +19,10 @@ namespace dbus {
 class Bus;
 }
 
+namespace power_manager {
+class PowerManagementPolicy;
+}
+
 namespace chromeos {
 
 // Callback used for processing the idle time.  The int64 param is the number of
@@ -165,6 +169,10 @@ class CHROMEOS_EXPORT PowerManagerClient {
       const base::TimeTicks& last_activity_time,
       bool is_fullscreen) = 0;
 
+  // Tells the power manager to begin using |policy|.
+  virtual void SetPolicy(
+      const power_manager::PowerManagementPolicy& policy) = 0;
+
   // Override the current power state on the machine. The overrides will be
   // applied to the request ID specified. To specify a new request; use 0 as the
   // request id and the method will call the provided callback with the new