Small refactor to media architecture in order to allow end-to-end tests.

media/audio/test_audio_input_controller_factory.h

Index: media/audio/test_audio_input_controller_factory.h
diff --git a/media/audio/test_audio_input_controller_factory.h b/media/audio/test_audio_input_controller_factory.h
index b4a2cb16b647dd642d2977771bcfb399b84b8fe1..3e86735e609ce4e1e2e158cdaad0f3ba8e6198e3 100644
--- a/media/audio/test_audio_input_controller_factory.h
+++ b/media/audio/test_audio_input_controller_factory.h
@@ -45,17 +45,29 @@ class TestAudioInputControllerFactory;
 
 class TestAudioInputController : public AudioInputController {
  public:
+  class Delegate {
+   public:
+    virtual void TestAudioControllerOpened(
+        TestAudioInputController* controller) = 0;
+    virtual void TestAudioControllerClosed(
+        TestAudioInputController* controller) = 0;
+  };
+
   TestAudioInputController(TestAudioInputControllerFactory* factory,
                            AudioManager* audio_manager,
+                           AudioParameters audio_parameters,
                            EventHandler* event_handler,
                            SyncWriter* sync_writer);
 
   // Returns the event handler installed on the AudioInputController.
   EventHandler* event_handler() const { return event_handler_; }
 
-  // Overriden to do nothing. It is assumed the caller will notify the event
-  // handler with recorded data and other events.
-  virtual void Record() OVERRIDE {}
+  // Returns the AudioParameters passed by the requester upon creation through
+  // AudioManager::Create(...).
+  const AudioParameters& audio_parameters() const { return audio_parameters_; }
+
+  // Notifies the TestAudioControllerOpened() event to the delegate (if any).
+  virtual void Record() OVERRIDE;
 
   // Ensure that the closure is run on the audio-manager thread.
   virtual void Close(const base::Closure& closed_task) OVERRIDE;
@@ -64,6 +76,8 @@ class TestAudioInputController : public AudioInputController {
   virtual ~TestAudioInputController();
 
  private:
+  AudioParameters audio_parameters_;
+
   // These are not owned by us and expected to be valid for this object's
   // lifetime.
   TestAudioInputControllerFactory* factory_;
@@ -72,11 +86,14 @@ class TestAudioInputController : public AudioInputController {
   DISALLOW_COPY_AND_ASSIGN(TestAudioInputController);
 };
 
+typedef TestAudioInputController::Delegate TestAudioInputControllerDelegate;
+
 // Simple AudioInputController::Factory method that creates
 // TestAudioInputControllers.
 class TestAudioInputControllerFactory : public AudioInputController::Factory {
  public:
   TestAudioInputControllerFactory();
+  virtual ~TestAudioInputControllerFactory();
 
   // AudioInputController::Factory methods.
   virtual AudioInputController* Create(
@@ -84,6 +101,8 @@ class TestAudioInputControllerFactory : public AudioInputController::Factory {
       AudioInputController::EventHandler* event_handler,
       AudioParameters params) OVERRIDE;
 
+  void SetDelegateForTests(TestAudioInputControllerDelegate* delegate);
+
   TestAudioInputController* controller() const { return controller_; }
 
  private:
@@ -96,6 +115,9 @@ class TestAudioInputControllerFactory : public AudioInputController::Factory {
   // The caller of Create owns this object.
   TestAudioInputController* controller_;
 
+  // The delegate for tests for receiving audio controller events.
+  TestAudioInputControllerDelegate* delegate_;
+
   DISALLOW_COPY_AND_ASSIGN(TestAudioInputControllerFactory);
 };