chromeos: Export SetDisplaySoftwareDimming D-Bus method.

This will replace the SoftwareScreenDimmingRequested signals
currently emitted by powerd.

BUG=221391


Review URL: https://chromiumcodereview.appspot.com/12770015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@190456 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/chromeos/dbus/display_power_service_provider.cc

@@ -29,6 +29,13 @@ void DisplayPowerServiceProvider::Start(
                  weak_ptr_factory_.GetWeakPtr()),
       base::Bind(&DisplayPowerServiceProvider::OnExported,
                  weak_ptr_factory_.GetWeakPtr()));
+  exported_object->ExportMethod(
+      kLibCrosServiceInterface,
+      kSetDisplaySoftwareDimming,
+      base::Bind(&DisplayPowerServiceProvider::SetDisplaySoftwareDimming,
+                 weak_ptr_factory_.GetWeakPtr()),
+      base::Bind(&DisplayPowerServiceProvider::OnExported,
+                 weak_ptr_factory_.GetWeakPtr()));
 }
 
 void DisplayPowerServiceProvider::OnExported(const std::string& interface_name,
@@ -63,4 +70,18 @@ void DisplayPowerServiceProvider::SetDisplayPower(
   response_sender.Run(dbus::Response::FromMethodCall(method_call));
 }
 
+void DisplayPowerServiceProvider::SetDisplaySoftwareDimming(
+    dbus::MethodCall* method_call,
+    dbus::ExportedObject::ResponseSender response_sender) {
+  dbus::MessageReader reader(method_call);
+  bool dimmed = false;
+  if (reader.PopBool(&dimmed)) {
+    ash::Shell::GetInstance()->SetDimming(dimmed);
+  } else {
+    LOG(ERROR) << "Unable to parse " << kSetDisplaySoftwareDimming
+               << " request";
+  }
+  response_sender.Run(dbus::Response::FromMethodCall(method_call));
+}
+
 }  // namespace chromeos

chrome/browser/chromeos/dbus/display_power_service_provider.h

@@ -21,8 +21,9 @@ class Response;
 
 namespace chromeos {
 
-// This class exports a "SetDisplayPower" D-Bus method that the power
-// manager calls to instruct Chrome to turn various displays on or off.
+// This class exports "SetDisplayPower" and "SetDisplaySoftwareDimming"
+// D-Bus methods that the power manager calls to instruct Chrome to turn
+// various displays on or off or dim them.
 class DisplayPowerServiceProvider
     : public CrosDBusService::ServiceProviderInterface {
  public:
@@ -34,15 +35,18 @@ class DisplayPowerServiceProvider
       scoped_refptr<dbus::ExportedObject> exported_object) OVERRIDE;
 
  private:
-  // Called from ExportedObject when SetDisplayPower() is exported as a D-Bus
+  // Called from ExportedObject when a handler is exported as a D-Bus
   // method or failed to be exported.
   void OnExported(const std::string& interface_name,
                   const std::string& method_name,
                   bool success);
 
-  // Called on UI thread in response to a D-Bus request.
+  // Called on UI thread in response to D-Bus requests.
   void SetDisplayPower(dbus::MethodCall* method_call,
                        dbus::ExportedObject::ResponseSender response_sender);
+  void SetDisplaySoftwareDimming(
+      dbus::MethodCall* method_call,
+      dbus::ExportedObject::ResponseSender response_sender);
 
   // Keep this last so that all weak pointers will be invalidated at the
   // beginning of destruction.