clang: Fix several -Woverloaded-virtual warnings.

media/audio/linux/alsa_output_unittest.cc

Index: media/audio/linux/alsa_output_unittest.cc
diff --git a/media/audio/linux/alsa_output_unittest.cc b/media/audio/linux/alsa_output_unittest.cc
index 83c0effc51db0adc841c69a97aefbf781d27f556..832aa5f8e3cf5f07e9deeb883b335d743096789b 100644
--- a/media/audio/linux/alsa_output_unittest.cc
+++ b/media/audio/linux/alsa_output_unittest.cc
@@ -80,12 +80,8 @@ class MockAudioManagerLinux : public AudioManagerLinux {
   MOCK_METHOD0(HasAudioInputDevices, bool());
   MOCK_METHOD1(MakeAudioOutputStream, AudioOutputStream*(
       AudioParameters params));
-  MOCK_METHOD5(MakeAudioInputStream, AudioInputStream*(
-      AudioParameters::Format format,
-      int channels,
-      int sample_rate,
-      char bits_per_sample,
-      uint32 samples_per_packet));
+  MOCK_METHOD1(MakeAudioInputStream, AudioInputStream*(
+      AudioParameters params));
   MOCK_METHOD0(MuteAll, void());
   MOCK_METHOD0(UnMuteAll, void());