Introduce PPB_AudioInput_Dev v0.3 and refactor the device enumeration code:

ppapi/cpp/dev/audio_input_dev.cc

Index: ppapi/cpp/dev/audio_input_dev.cc
diff --git a/ppapi/cpp/dev/audio_input_dev.cc b/ppapi/cpp/dev/audio_input_dev.cc
index 4c161a15552044bd9857ae8ef291feac5f9ecf6d..cc0f08b4527465cf4870f9e0ed9a5810db1cdac0 100644
--- a/ppapi/cpp/dev/audio_input_dev.cc
+++ b/ppapi/cpp/dev/audio_input_dev.cc
@@ -18,13 +18,20 @@ template <> const char* interface_name<PPB_AudioInput_Dev_0_2>() {
   return PPB_AUDIO_INPUT_DEV_INTERFACE_0_2;
 }
 
+template <> const char* interface_name<PPB_AudioInput_Dev_0_3>() {
+  return PPB_AUDIO_INPUT_DEV_INTERFACE_0_3;
+}
+
 }  // namespace
 
 AudioInput_Dev::AudioInput_Dev() {
 }
 
 AudioInput_Dev::AudioInput_Dev(const InstanceHandle& instance) {
-  if (has_interface<PPB_AudioInput_Dev_0_2>()) {
+  if (has_interface<PPB_AudioInput_Dev_0_3>()) {
+    PassRefFromConstructor(get_interface<PPB_AudioInput_Dev_0_3>()->Create(
+        instance.pp_instance()));
+  } else if (has_interface<PPB_AudioInput_Dev_0_2>()) {
     PassRefFromConstructor(get_interface<PPB_AudioInput_Dev_0_2>()->Create(
         instance.pp_instance()));
   }
@@ -35,24 +42,42 @@ AudioInput_Dev::~AudioInput_Dev() {
 
 // static
 bool AudioInput_Dev::IsAvailable() {
-  return has_interface<PPB_AudioInput_Dev_0_2>();
+  return has_interface<PPB_AudioInput_Dev_0_3>() ||
+         has_interface<PPB_AudioInput_Dev_0_2>();
 }
 
 int32_t AudioInput_Dev::EnumerateDevices(
     const CompletionCallbackWithOutput<std::vector<DeviceRef_Dev> >& callback) {
-  if (!has_interface<PPB_AudioInput_Dev_0_2>())
-    return callback.MayForce(PP_ERROR_NOINTERFACE);
-  if (!callback.pp_completion_callback().func)
-    return callback.MayForce(PP_ERROR_BLOCKS_MAIN_THREAD);
-
-  // ArrayOutputCallbackConverter is responsible to delete it.
-  ResourceArray_Dev::ArrayOutputCallbackData* data =
-      new ResourceArray_Dev::ArrayOutputCallbackData(
-          callback.output(), callback.pp_completion_callback());
-  return get_interface<PPB_AudioInput_Dev_0_2>()->EnumerateDevices(
-      pp_resource(), &data->resource_array_output,
-      PP_MakeCompletionCallback(
-          &ResourceArray_Dev::ArrayOutputCallbackConverter, data));
+  if (has_interface<PPB_AudioInput_Dev_0_3>()) {
+    return get_interface<PPB_AudioInput_Dev_0_3>()->EnumerateDevices(
+        pp_resource(), callback.output(), callback.pp_completion_callback());
+  }
+  if (has_interface<PPB_AudioInput_Dev_0_2>()) {
+    if (!callback.pp_completion_callback().func)
+      return callback.MayForce(PP_ERROR_BLOCKS_MAIN_THREAD);
+
+    // ArrayOutputCallbackConverter is responsible to delete it.
+    ResourceArray_Dev::ArrayOutputCallbackData* data =
+        new ResourceArray_Dev::ArrayOutputCallbackData(
+            callback.output(), callback.pp_completion_callback());
+    return get_interface<PPB_AudioInput_Dev_0_2>()->EnumerateDevices(
+        pp_resource(), &data->resource_array_output,
+        PP_MakeCompletionCallback(
+            &ResourceArray_Dev::ArrayOutputCallbackConverter, data));
+  }
+
+  return callback.MayForce(PP_ERROR_NOINTERFACE);
+}
+
+int32_t AudioInput_Dev::MonitorDeviceChange(
+    PP_MonitorDeviceChangeCallback callback,
+    void* user_data) {
+  if (has_interface<PPB_AudioInput_Dev_0_3>()) {
+    return get_interface<PPB_AudioInput_Dev_0_3>()->MonitorDeviceChange(
+        pp_resource(), callback, user_data);
+  }
+
+  return PP_ERROR_NOINTERFACE;
 }
 
 int32_t AudioInput_Dev::Open(const DeviceRef_Dev& device_ref,
@@ -60,6 +85,11 @@ int32_t AudioInput_Dev::Open(const DeviceRef_Dev& device_ref,
                              PPB_AudioInput_Callback audio_input_callback,
                              void* user_data,
                              const CompletionCallback& callback) {
+  if (has_interface<PPB_AudioInput_Dev_0_3>()) {
+    return get_interface<PPB_AudioInput_Dev_0_3>()->Open(
+        pp_resource(), device_ref.pp_resource(), config.pp_resource(),
+        audio_input_callback, user_data, callback.pp_completion_callback());
+  }
   if (has_interface<PPB_AudioInput_Dev_0_2>()) {
     return get_interface<PPB_AudioInput_Dev_0_2>()->Open(
         pp_resource(), device_ref.pp_resource(), config.pp_resource(),
@@ -70,6 +100,10 @@ int32_t AudioInput_Dev::Open(const DeviceRef_Dev& device_ref,
 }
 
 bool AudioInput_Dev::StartCapture() {
+  if (has_interface<PPB_AudioInput_Dev_0_3>()) {
+    return PP_ToBool(get_interface<PPB_AudioInput_Dev_0_3>()->StartCapture(
+        pp_resource()));
+  }
   if (has_interface<PPB_AudioInput_Dev_0_2>()) {
     return PP_ToBool(get_interface<PPB_AudioInput_Dev_0_2>()->StartCapture(
         pp_resource()));
@@ -79,6 +113,10 @@ bool AudioInput_Dev::StartCapture() {
 }
 
 bool AudioInput_Dev::StopCapture() {
+  if (has_interface<PPB_AudioInput_Dev_0_3>()) {
+    return PP_ToBool(get_interface<PPB_AudioInput_Dev_0_3>()->StopCapture(
+        pp_resource()));
+  }
   if (has_interface<PPB_AudioInput_Dev_0_2>()) {
     return PP_ToBool(get_interface<PPB_AudioInput_Dev_0_2>()->StopCapture(
         pp_resource()));
@@ -88,8 +126,11 @@ bool AudioInput_Dev::StopCapture() {
 }
 
 void AudioInput_Dev::Close() {
-  if (has_interface<PPB_AudioInput_Dev_0_2>())
+  if (has_interface<PPB_AudioInput_Dev_0_3>()) {
+    get_interface<PPB_AudioInput_Dev_0_3>()->Close(pp_resource());
+  } else if (has_interface<PPB_AudioInput_Dev_0_2>()) {
     get_interface<PPB_AudioInput_Dev_0_2>()->Close(pp_resource());
+  }
 }
 
 }  // namespace pp