Re-land chromeos: Add non-extension renderers to the freezer cgroup

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 b68800271e47dc5da09db949409674e3a8d1adfa..d240376413616d113f4b6f2695c52abc2f82dd86 100644
--- a/chromeos/dbus/power_manager_client.h
+++ b/chromeos/dbus/power_manager_client.h
@@ -9,6 +9,7 @@
 
 #include "base/basictypes.h"
 #include "base/callback.h"
+#include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "chromeos/chromeos_export.h"
 #include "chromeos/dbus/dbus_client.h"
@@ -102,6 +103,26 @@ class CHROMEOS_EXPORT PowerManagerClient : public DBusClient {
   virtual void RemoveObserver(Observer* observer) = 0;
   virtual bool HasObserver(const Observer* observer) const = 0;
 
+  // Interface for managing the power consumption of renderer processes.
+  class RenderProcessManagerDelegate {
+   public:
+    virtual ~RenderProcessManagerDelegate() {}
+
+    // Called when a suspend attempt is imminent but after all registered
+    // observers have reported readiness to suspend.

[Daniel Erat, 2014/11/19 23:41:26]

mind also documenting how this interacts with dark resume?

[Chirantan Ekbote, 2014/11/20 00:59:37]

Done.

+    virtual void SuspendImminent() = 0;
+
+    // Called when a previously announced suspend attempt has completed.  This
+    // method is called before observers are notified that the suspend has
+    // completed.
+    virtual void SuspendDone() = 0;
+  };
+
+  // Sets the PowerManagerClient's RenderProcessManagerDelegate.  There can only
+  // be one delegate.
+  virtual void SetRenderProcessManagerDelegate(
+      base::WeakPtr<RenderProcessManagerDelegate> delegate) = 0;
+
   // Decreases the screen brightness. |allow_off| controls whether or not
   // it's allowed to turn off the back light.
   virtual void DecreaseScreenBrightness(bool allow_off) = 0;