Refactor AudioInputController and split stat by stream type.

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 25e02d82dd501d7b4a2d8fc34a020a7934ed7aa9..9d40752cf0868957a63cb426793b78fa118fb293 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -24287,6 +24287,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </histogram>
 
 <histogram name="Media.Audio.Capture.CallbackError" enum="BooleanError">
+  <obsolete>
+    Deprecated as of 02/2017.
+  </obsolete>
   <owner>tommi@chromium.org</owner>
   <summary>
     A boolean that reflects whether or not an error was reported during audio
@@ -24320,6 +24323,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Media.Audio.Capture.HighLatencyCallbackError"
+    enum="BooleanError">
+  <owner>maxmorin@chromium.org</owner>
+  <summary>
+    A boolean that reflects whether or not an error was reported during audio
+    capture for a high latency stream.
+  </summary>
+</histogram>
+
 <histogram name="Media.Audio.Capture.LargestGlitchMs" units="ms">
   <owner>grunell@chromium.org</owner>
   <summary>
@@ -24339,6 +24351,23 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Media.Audio.Capture.LowLatencyCallbackError"
+    enum="BooleanError">
+  <owner>maxmorin@chromium.org</owner>
+  <summary>
+    A boolean that reflects whether or not an error was reported during audio
+    capture for a low latency stream.
+  </summary>
+</histogram>
+
+<histogram name="Media.Audio.Capture.VirtualCallbackError" enum="BooleanError">
+  <owner>maxmorin@chromium.org</owner>
+  <summary>
+    A boolean that reflects whether or not an error was reported during audio
+    capture for a virtual stream.
+  </summary>
+</histogram>
+
 <histogram name="Media.Audio.InputBufferSizeWasChangedAudioWorkedMac"
     enum="BooleanChanged">
   <owner>henrika@chromium.org</owner>
@@ -24767,6 +24796,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 
 <histogram name="Media.AudioInputControllerCaptureStartupSuccess"
     enum="CaptureStartupResult">
+  <obsolete>
+    Deprecated as of 02/2017.
+  </obsolete>
   <owner>dalecurtis@chromium.org</owner>
   <summary>
     Whether capture started successfully after an input stream startup was
@@ -25535,6 +25567,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Media.HighLatencyAudioCaptureStartupSuccess"
+    enum="AudioCaptureStartupResult">
+  <owner>maxmorin@chromium.org</owner>
+  <summary>
+    Whether capture started successfully after a high-latency input stream
+    startup was requested.
+  </summary>
+</histogram>
+
 <histogram name="Media.InfoLoadDelay" units="ms">
   <owner>qinmin@chromium.org</owner>
   <summary>
@@ -25579,6 +25620,14 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Media.InputStreamDurationWithoutCallback" units="ms">
+  <owner>maxmorin@chromium.org</owner>
+  <summary>
+    Duration in milliseconds of low-latency audio input streams which never got
+    any callbacks.
+  </summary>
+</histogram>
+
 <histogram name="Media.IsStreaming" enum="Boolean">
   <owner>sandersd@chromium.org</owner>
   <summary>
@@ -25608,6 +25657,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Media.LowLatencyAudioCaptureStartupSuccess"
+    enum="AudioCaptureStartupResult">
+  <owner>maxmorin@chromium.org</owner>
+  <summary>
+    Whether capture started successfully after a low-latency input stream
+    startup was requested.
+  </summary>
+</histogram>
+
 <histogram name="Media.MicrophoneMuted" enum="MicrophoneMuteResult">
   <owner>henrika@chromium.org</owner>
   <summary>
@@ -26582,6 +26640,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <summary>Visible width of HTML5 video.</summary>
 </histogram>
 
+<histogram name="Media.VirtualAudioCaptureStartupSuccess"
+    enum="AudioCaptureStartupResult">
+  <owner>maxmorin@chromium.org</owner>
+  <summary>
+    Whether capture started successfully after a high-latency input stream
+    startup was requested.
+  </summary>
+</histogram>
+
 <histogram name="Media.Vpx.VideoDecoderBuffersInUseByDecoder">
   <obsolete>
     Deprecated 05/2016.
@@ -78700,6 +78767,14 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="12" label="Other error (file missing)"/>
 </enum>
 
+<enum name="AudioCaptureStartupResult" type="int">
+  <int value="0" label="OK"/>
+  <int value="1" label="Failed to create high latency stream"/>
+  <int value="2" label="Failed to open high latency stream"/>
+  <int value="3" label="Never received any data"/>
+  <int value="4" label="No data received and capture stopped within 500ms"/>
+</enum>
+
 <enum name="AudioCodec" type="int">
   <int value="0" label="kUnknownAudioCodec"/>
   <int value="1" label="kCodecAAC"/>
@@ -80655,6 +80730,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </enum>
 
 <enum name="CaptureStartupResult" type="int">
+  <obsolete>
+    Deprecated as of 02/2017.
+  </obsolete>
   <int value="0" label="No data callback"/>
   <int value="1" label="OK"/>
   <int value="2" label="Failed to create high latency stream"/>