Enable Tracing on content shell for Android

content/shell/android/shell_library_loader.cc

 // Copyright (c) 2012 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/basictypes.h"
 #include "base/debug/debugger.h"
 #include "base/logging.h"
 #include "base/android/jni_android.h"
 #include "base/android/jni_registrar.h"
 #include "content/public/app/android_library_loader_hooks.h"
 #include "content/public/app/content_main.h"
 #include "content/public/browser/android/compositor.h"
 #include "content/shell/android/shell_manager.h"
+#include "content/shell/android/tracing_shell.h"
 #include "content/shell/shell.h"
 #include "content/shell/shell_main_delegate.h"
 
 static base::android::RegistrationMethod kRegistrationMethods[] = {
     { "Shell", content::Shell::Register },
     { "ShellManager", content::RegisterShellManager },
+    { "TraceController", content::RegisterTracingHandler },
 };
 
 // This is called by the VM when the shared library is first loaded.
 JNI_EXPORT jint JNI_OnLoad(JavaVM* vm, void* reserved) {
   base::android::InitVM(vm);
   JNIEnv* env = base::android::AttachCurrentThread();
   if (!content::RegisterLibraryLoaderEntryHook(env))
     return -1;
 
   // To be called only from the UI thread.  If loading the library is done on
   // a separate thread, this should be moved elsewhere.
   if (!base::android::RegisterNativeMethods(env, kRegistrationMethods,
                                             arraysize(kRegistrationMethods)))
     return -1;
 
   content::Compositor::Initialize();
 
   content::SetContentMainDelegate(new content::ShellMainDelegate());
 
   return JNI_VERSION_1_4;
 }