Add TraceProviderRegistry and implementation in tracing service/application.

mojo/dart/packages/mojo_services/lib/tracing/trace_provider_registry.mojom.dart

Index: mojo/dart/packages/mojo_services/lib/tracing/trace_provider_registry.mojom.dart
diff --git a/mojo/dart/packages/mojo_services/lib/mojo/media/audio_server.mojom.dart b/mojo/dart/packages/mojo_services/lib/tracing/trace_provider_registry.mojom.dart
similarity index 52%
copy from mojo/dart/packages/mojo_services/lib/mojo/media/audio_server.mojom.dart
copy to mojo/dart/packages/mojo_services/lib/tracing/trace_provider_registry.mojom.dart
index 02b8d64fe2f6e4ca34c3dcd49750b86883a9d660..7b918bcbbd389ac33adbc9212dffcf5b913a087a 100644
--- a/mojo/dart/packages/mojo_services/lib/mojo/media/audio_server.mojom.dart
+++ b/mojo/dart/packages/mojo_services/lib/tracing/trace_provider_registry.mojom.dart
@@ -2,24 +2,24 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-library audio_server_mojom;
+library trace_provider_registry_mojom;
 import 'dart:async';
 import 'package:mojo/bindings.dart' as bindings;
 import 'package:mojo/core.dart' as core;
 import 'package:mojo/mojo/bindings/types/service_describer.mojom.dart' as service_describer;
-import 'package:mojo_services/mojo/media/audio_track.mojom.dart' as audio_track_mojom;
+import 'package:mojo_services/tracing/tracing.mojom.dart' as tracing_mojom;
 
 
 
-class _AudioServerCreateTrackParams extends bindings.Struct {
+class _TraceProviderRegistryRegisterTraceProviderParams extends bindings.Struct {
   static const List<bindings.StructDataHeader> kVersions = const [
     const bindings.StructDataHeader(16, 0)
   ];
-  Object track = null;
+  Object traceProvider = null;
 
-  _AudioServerCreateTrackParams() : super(kVersions.last.size);
+  _TraceProviderRegistryRegisterTraceProviderParams() : super(kVersions.last.size);
 
-  static _AudioServerCreateTrackParams deserialize(bindings.Message message) {
+  static _TraceProviderRegistryRegisterTraceProviderParams deserialize(bindings.Message message) {
     var decoder = new bindings.Decoder(message);
     var result = decode(decoder);
     if (decoder.excessHandles != null) {
@@ -28,11 +28,11 @@ class _AudioServerCreateTrackParams extends bindings.Struct {
     return result;
   }
 
-  static _AudioServerCreateTrackParams decode(bindings.Decoder decoder0) {
+  static _TraceProviderRegistryRegisterTraceProviderParams decode(bindings.Decoder decoder0) {
     if (decoder0 == null) {
       return null;
     }
-    _AudioServerCreateTrackParams result = new _AudioServerCreateTrackParams();
+    _TraceProviderRegistryRegisterTraceProviderParams result = new _TraceProviderRegistryRegisterTraceProviderParams();
 
     var mainDataHeader = decoder0.decodeStructDataHeader();
     if (mainDataHeader.version <= kVersions.last.version) {
@@ -54,7 +54,7 @@ class _AudioServerCreateTrackParams extends bindings.Struct {
     }
     if (mainDataHeader.version >= 0) {
       
-      result.track = decoder0.decodeInterfaceRequest(8, false, audio_track_mojom.AudioTrackStub.newFromEndpoint);
+      result.traceProvider = decoder0.decodeServiceInterface(8, false, tracing_mojom.TraceProviderProxy.newFromEndpoint);
     }
     return result;
   }
@@ -62,17 +62,17 @@ class _AudioServerCreateTrackParams extends bindings.Struct {
   void encode(bindings.Encoder encoder) {
     var encoder0 = encoder.getStructEncoderAtOffset(kVersions.last);
     try {
-      encoder0.encodeInterfaceRequest(track, 8, false);
+      encoder0.encodeInterface(traceProvider, 8, false);
     } on bindings.MojoCodecError catch(e) {
       e.message = "Error encountered while encoding field "
-          "track of struct _AudioServerCreateTrackParams: $e";
+          "traceProvider of struct _TraceProviderRegistryRegisterTraceProviderParams: $e";
       rethrow;
     }
   }
 
   String toString() {
-    return "_AudioServerCreateTrackParams("
-           "track: $track" ")";
+    return "_TraceProviderRegistryRegisterTraceProviderParams("
+           "traceProvider: $traceProvider" ")";
   }
 
   Map toJson() {
@@ -81,9 +81,9 @@ class _AudioServerCreateTrackParams extends bindings.Struct {
   }
 }
 
-const int _audioServerMethodCreateTrackName = 0;
+const int _traceProviderRegistryMethodRegisterTraceProviderName = 0;
 
-class _AudioServerServiceDescription implements service_describer.ServiceDescription {
+class _TraceProviderRegistryServiceDescription implements service_describer.ServiceDescription {
   dynamic getTopLevelInterface([Function responseFactory]) =>
       responseFactory(null);
 
@@ -94,29 +94,29 @@ class _AudioServerServiceDescription implements service_describer.ServiceDescrip
       responseFactory(null);
 }
 
-abstract class AudioServer {
-  static const String serviceName = "mojo::media::AudioServer";
-  void createTrack(Object track);
+abstract class TraceProviderRegistry {
+  static const String serviceName = "tracing.TraceProviderRegistry";
+  void registerTraceProvider(Object traceProvider);
 }
 
 
-class _AudioServerProxyImpl extends bindings.Proxy {
-  _AudioServerProxyImpl.fromEndpoint(
+class _TraceProviderRegistryProxyImpl extends bindings.Proxy {
+  _TraceProviderRegistryProxyImpl.fromEndpoint(
       core.MojoMessagePipeEndpoint endpoint) : super.fromEndpoint(endpoint);
 
-  _AudioServerProxyImpl.fromHandle(core.MojoHandle handle) :
+  _TraceProviderRegistryProxyImpl.fromHandle(core.MojoHandle handle) :
       super.fromHandle(handle);
 
-  _AudioServerProxyImpl.unbound() : super.unbound();
+  _TraceProviderRegistryProxyImpl.unbound() : super.unbound();
 
-  static _AudioServerProxyImpl newFromEndpoint(
+  static _TraceProviderRegistryProxyImpl newFromEndpoint(
       core.MojoMessagePipeEndpoint endpoint) {
-    assert(endpoint.setDescription("For _AudioServerProxyImpl"));
-    return new _AudioServerProxyImpl.fromEndpoint(endpoint);
+    assert(endpoint.setDescription("For _TraceProviderRegistryProxyImpl"));
+    return new _TraceProviderRegistryProxyImpl.fromEndpoint(endpoint);
   }
 
   service_describer.ServiceDescription get serviceDescription =>
-    new _AudioServerServiceDescription();
+    new _TraceProviderRegistryServiceDescription();
 
   void handleResponse(bindings.ServiceMessage message) {
     switch (message.header.type) {
@@ -129,65 +129,65 @@ class _AudioServerProxyImpl extends bindings.Proxy {
 
   String toString() {
     var superString = super.toString();
-    return "_AudioServerProxyImpl($superString)";
+    return "_TraceProviderRegistryProxyImpl($superString)";
   }
 }
 
 
-class _AudioServerProxyCalls implements AudioServer {
-  _AudioServerProxyImpl _proxyImpl;
+class _TraceProviderRegistryProxyCalls implements TraceProviderRegistry {
+  _TraceProviderRegistryProxyImpl _proxyImpl;
 
-  _AudioServerProxyCalls(this._proxyImpl);
-    void createTrack(Object track) {
+  _TraceProviderRegistryProxyCalls(this._proxyImpl);
+    void registerTraceProvider(Object traceProvider) {
       if (!_proxyImpl.isBound) {
         _proxyImpl.proxyError("The Proxy is closed.");
         return;
       }
-      var params = new _AudioServerCreateTrackParams();
-      params.track = track;
-      _proxyImpl.sendMessage(params, _audioServerMethodCreateTrackName);
+      var params = new _TraceProviderRegistryRegisterTraceProviderParams();
+      params.traceProvider = traceProvider;
+      _proxyImpl.sendMessage(params, _traceProviderRegistryMethodRegisterTraceProviderName);
     }
 }
 
 
-class AudioServerProxy implements bindings.ProxyBase {
+class TraceProviderRegistryProxy implements bindings.ProxyBase {
   final bindings.Proxy impl;
-  AudioServer ptr;
+  TraceProviderRegistry ptr;
 
-  AudioServerProxy(_AudioServerProxyImpl proxyImpl) :
+  TraceProviderRegistryProxy(_TraceProviderRegistryProxyImpl proxyImpl) :
       impl = proxyImpl,
-      ptr = new _AudioServerProxyCalls(proxyImpl);
+      ptr = new _TraceProviderRegistryProxyCalls(proxyImpl);
 
-  AudioServerProxy.fromEndpoint(
+  TraceProviderRegistryProxy.fromEndpoint(
       core.MojoMessagePipeEndpoint endpoint) :
-      impl = new _AudioServerProxyImpl.fromEndpoint(endpoint) {
-    ptr = new _AudioServerProxyCalls(impl);
+      impl = new _TraceProviderRegistryProxyImpl.fromEndpoint(endpoint) {
+    ptr = new _TraceProviderRegistryProxyCalls(impl);
   }
 
-  AudioServerProxy.fromHandle(core.MojoHandle handle) :
-      impl = new _AudioServerProxyImpl.fromHandle(handle) {
-    ptr = new _AudioServerProxyCalls(impl);
+  TraceProviderRegistryProxy.fromHandle(core.MojoHandle handle) :
+      impl = new _TraceProviderRegistryProxyImpl.fromHandle(handle) {
+    ptr = new _TraceProviderRegistryProxyCalls(impl);
   }
 
-  AudioServerProxy.unbound() :
-      impl = new _AudioServerProxyImpl.unbound() {
-    ptr = new _AudioServerProxyCalls(impl);
+  TraceProviderRegistryProxy.unbound() :
+      impl = new _TraceProviderRegistryProxyImpl.unbound() {
+    ptr = new _TraceProviderRegistryProxyCalls(impl);
   }
 
-  factory AudioServerProxy.connectToService(
+  factory TraceProviderRegistryProxy.connectToService(
       bindings.ServiceConnector s, String url, [String serviceName]) {
-    AudioServerProxy p = new AudioServerProxy.unbound();
+    TraceProviderRegistryProxy p = new TraceProviderRegistryProxy.unbound();
     s.connectToService(url, p, serviceName);
     return p;
   }
 
-  static AudioServerProxy newFromEndpoint(
+  static TraceProviderRegistryProxy newFromEndpoint(
       core.MojoMessagePipeEndpoint endpoint) {
-    assert(endpoint.setDescription("For AudioServerProxy"));
-    return new AudioServerProxy.fromEndpoint(endpoint);
+    assert(endpoint.setDescription("For TraceProviderRegistryProxy"));
+    return new TraceProviderRegistryProxy.fromEndpoint(endpoint);
   }
 
-  String get serviceName => AudioServer.serviceName;
+  String get serviceName => TraceProviderRegistry.serviceName;
 
   Future close({bool immediate: false}) => impl.close(immediate: immediate);
 
@@ -204,27 +204,27 @@ class AudioServerProxy implements bindings.ProxyBase {
   }
 
   String toString() {
-    return "AudioServerProxy($impl)";
+    return "TraceProviderRegistryProxy($impl)";
   }
 }
 
 
-class AudioServerStub extends bindings.Stub {
-  AudioServer _impl = null;
+class TraceProviderRegistryStub extends bindings.Stub {
+  TraceProviderRegistry _impl = null;
 
-  AudioServerStub.fromEndpoint(
+  TraceProviderRegistryStub.fromEndpoint(
       core.MojoMessagePipeEndpoint endpoint, [this._impl])
       : super.fromEndpoint(endpoint);
 
-  AudioServerStub.fromHandle(core.MojoHandle handle, [this._impl])
+  TraceProviderRegistryStub.fromHandle(core.MojoHandle handle, [this._impl])
       : super.fromHandle(handle);
 
-  AudioServerStub.unbound() : super.unbound();
+  TraceProviderRegistryStub.unbound() : super.unbound();
 
-  static AudioServerStub newFromEndpoint(
+  static TraceProviderRegistryStub newFromEndpoint(
       core.MojoMessagePipeEndpoint endpoint) {
-    assert(endpoint.setDescription("For AudioServerStub"));
-    return new AudioServerStub.fromEndpoint(endpoint);
+    assert(endpoint.setDescription("For TraceProviderRegistryStub"));
+    return new TraceProviderRegistryStub.fromEndpoint(endpoint);
   }
 
 
@@ -237,10 +237,10 @@ class AudioServerStub extends bindings.Stub {
     }
     assert(_impl != null);
     switch (message.header.type) {
-      case _audioServerMethodCreateTrackName:
-        var params = _AudioServerCreateTrackParams.deserialize(
+      case _traceProviderRegistryMethodRegisterTraceProviderName:
+        var params = _TraceProviderRegistryRegisterTraceProviderParams.deserialize(
             message.payload);
-        _impl.createTrack(params.track);
+        _impl.registerTraceProvider(params.traceProvider);
         break;
       default:
         throw new bindings.MojoCodecError("Unexpected message name");
@@ -249,15 +249,15 @@ class AudioServerStub extends bindings.Stub {
     return null;
   }
 
-  AudioServer get impl => _impl;
-  set impl(AudioServer d) {
+  TraceProviderRegistry get impl => _impl;
+  set impl(TraceProviderRegistry d) {
     assert(_impl == null);
     _impl = d;
   }
 
   String toString() {
     var superString = super.toString();
-    return "AudioServerStub($superString)";
+    return "TraceProviderRegistryStub($superString)";
   }
 
   int get version => 0;
@@ -265,7 +265,7 @@ class AudioServerStub extends bindings.Stub {
   static service_describer.ServiceDescription _cachedServiceDescription;
   static service_describer.ServiceDescription get serviceDescription {
     if (_cachedServiceDescription == null) {
-      _cachedServiceDescription = new _AudioServerServiceDescription();
+      _cachedServiceDescription = new _TraceProviderRegistryServiceDescription();
     }
     return _cachedServiceDescription;
   }