Add a new parameter |latency| to PPB_Audio.

content/renderer/pepper/ppb_audio_impl.h

Index: content/renderer/pepper/ppb_audio_impl.h
diff --git a/content/renderer/pepper/ppb_audio_impl.h b/content/renderer/pepper/ppb_audio_impl.h
index 62a4dd275b18a93e1f6f184f3b0490b84efeff1b..c291025a39b6d969ba4d654617c2eba38dd89b7b 100644
--- a/content/renderer/pepper/ppb_audio_impl.h
+++ b/content/renderer/pepper/ppb_audio_impl.h
@@ -37,12 +37,12 @@ class PPB_Audio_Impl : public ::ppapi::Resource,
   // and will return 0 on failure.
   static PP_Resource Create(PP_Instance instance,
                             PP_Resource config_id,
-                            PPB_Audio_Callback audio_callback,
+                            const ppapi::AudioCallback& audio_callback,
                             void* user_data);
 
   // Initialization function for trusted init.
   bool Init(PP_Resource config_id,
-            PPB_Audio_Callback user_callback,
+            const ppapi::AudioCallback& user_callback,
             void* user_data);
 
   // Resource overrides.
@@ -73,9 +73,6 @@ class PPB_Audio_Impl : public ::ppapi::Resource,
   // own this pointer but are responsible for calling Shutdown on it.
   PepperPlatformAudioOutput* audio_;
 
-  // Track frame count for passing on to PPB_Audio_Shared::SetStreamInfo().
-  int sample_frame_count_;
-
   DISALLOW_COPY_AND_ASSIGN(PPB_Audio_Impl);
 };