UMA log for audio_device Init and Start(Playout|Recording). Make Init return a more specific error …

webrtc/modules/audio_device/android/audio_device_template.h

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 35 matching lines @@
 
   virtual ~AudioDeviceTemplate() { LOG(INFO) << __FUNCTION__; }
 
   int32_t ActiveAudioLayer(
       AudioDeviceModule::AudioLayer& audioLayer) const override {
     LOG(INFO) << __FUNCTION__;
     audioLayer = audio_layer_;
     return 0;
   }
 
-  int32_t Init() override {
+  InitStatus Init() override {
     LOG(INFO) << __FUNCTION__;
     RTC_DCHECK(thread_checker_.CalledOnValidThread());
     RTC_DCHECK(!initialized_);
-    if (!audio_manager_->Init())
-      return -1;
+    if (!audio_manager_->Init()) {
+      return InitStatus::OTHER_ERROR;
+    }
     if (output_.Init() != 0) {
       audio_manager_->Close();
-      return -1;
+      return InitStatus::PLAYOUT_ERROR;
     }
     if (input_.Init() != 0) {
       output_.Terminate();
       audio_manager_->Close();
-      return -1;
+      return InitStatus::RECORDING_ERROR;
     }
     initialized_ = true;
-    return 0;
+    return InitStatus::OK;
   }
 
   int32_t Terminate() override {
     LOG(INFO) << __FUNCTION__;
     RTC_DCHECK(thread_checker_.CalledOnValidThread());
     int32_t err = input_.Terminate();
     err |= output_.Terminate();
     err |= !audio_manager_->Close();
     initialized_ = false;
     RTC_DCHECK_EQ(err, 0);
@@ skipping 472 matching lines @@
   OutputType output_;
 
   InputType input_;
 
   bool initialized_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_DEVICE_ANDROID_AUDIO_DEVICE_TEMPLATE_H_