Enable tracing in SkyShell

sky/shell/library_loader.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/android/base_jni_onload.h"
 #include "base/android/base_jni_registrar.h"
 #include "base/android/jni_android.h"
 #include "base/android/jni_registrar.h"
 #include "base/android/library_loader/library_loader_hooks.h"
 #include "base/bind.h"
 #include "base/logging.h"
 #include "mojo/android/system/core_impl.h"
 #include "sky/shell/java_service_provider.h"
 #include "sky/shell/platform_view.h"
 #include "sky/shell/sky_main.h"
+#include "sky/shell/tracing_controller.h"
 
 namespace {
 
 base::android::RegistrationMethod kSkyRegisteredMethods[] = {
     {"CoreImpl", mojo::android::RegisterCoreImpl},
     {"JavaServiceProvider", sky::shell::RegisterJavaServiceProvider},
+    {"PlatformView", sky::shell::PlatformView::Register},
     {"SkyMain", sky::shell::RegisterSkyMain},
-    {"PlatformView", sky::shell::PlatformView::Register},
+    {"TracingController", sky::shell::RegisterTracingController},
 };
 
 bool RegisterJNI(JNIEnv* env) {
   if (!base::android::RegisterJni(env))
     return false;
 
   return RegisterNativeMethods(env, kSkyRegisteredMethods,
                                arraysize(kSkyRegisteredMethods));
 }
 
 }  // namespace
 
 // This is called by the VM when the shared library is first loaded.
 JNI_EXPORT jint JNI_OnLoad(JavaVM* vm, void* reserved) {
   std::vector<base::android::RegisterCallback> register_callbacks;
   register_callbacks.push_back(base::Bind(&RegisterJNI));
   if (!base::android::OnJNIOnLoadRegisterJNI(vm, register_callbacks) ||
       !base::android::OnJNIOnLoadInit(
           std::vector<base::android::InitCallback>())) {
     return -1;
   }
 
   return JNI_VERSION_1_4;
 }