Add a new audio extension event OnLevelChanged.

chromeos/audio/cras_audio_handler_unittest.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chromeos/audio/cras_audio_handler.h"
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/values.h"
@@ skipping 241 matching lines @@
   void OnActiveInputNodeChanged() override {
     ++active_input_node_changed_count_;
   }
 
   void OnAudioNodesChanged() override { ++audio_nodes_changed_count_; }
 
   void OnOutputMuteChanged() override { ++output_mute_changed_count_; }
 
   void OnInputMuteChanged() override { ++input_mute_changed_count_; }
 
-  void OnOutputVolumeChanged() override { ++output_volume_changed_count_; }
+  void OnOutputNodeVolumeChanged(uint64 node_id, double volume) override {
+    ++output_volume_changed_count_;
+  }
 
   void OnInputGainChanged() override { ++input_gain_changed_count_; }
 
  private:
   int active_output_node_changed_count_;
   int active_input_node_changed_count_;
   int audio_nodes_changed_count_;
   int output_mute_changed_count_;
   int input_mute_changed_count_;
   int output_volume_changed_count_;
@@ skipping 1531 matching lines @@
 
 TEST_F(CrasAudioHandlerTest, SetOutputVolumePercent) {
   AudioNodeList audio_nodes;
   audio_nodes.push_back(kInternalSpeaker);
   SetUpCrasAudioHandler(audio_nodes);
   EXPECT_EQ(0, test_observer_->output_volume_changed_count());
 
   cras_audio_handler_->SetOutputVolumePercent(60);
 
   // Verify the output volume is changed to the designated value,
-  // OnOutputVolumeChanged event is fired, and the device volume value
+  // OnOutputNodeVolumeChanged event is fired, and the device volume value
   // is saved the preferences.
   const int kVolume = 60;
   EXPECT_EQ(kVolume, cras_audio_handler_->GetOutputVolumePercent());
   EXPECT_EQ(1, test_observer_->output_volume_changed_count());
   AudioDevice device;
   EXPECT_TRUE(cras_audio_handler_->GetPrimaryActiveOutputDevice(&device));
   EXPECT_EQ(device.id, kInternalSpeaker.id);
   EXPECT_EQ(kVolume, audio_pref_handler_->GetOutputVolumeValue(&device));
 }
 
@@ skipping 597 matching lines @@
   hdmi.plugged_time = 90000000;
   audio_nodes.push_back(hdmi);
   ChangeAudioNodes(audio_nodes);
 
   // The active output should not change.
   EXPECT_EQ(kInternalSpeaker.id,
             cras_audio_handler_->GetPrimaryActiveOutputNode());
 }
 
 }  // namespace chromeos