Teach the mojo_shell --trace-startup flag to gather data from services

shell/android/main.cc

 // Copyright 2013 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 "shell/android/main.h"
 
 #include "base/android/fifo_utils.h"
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
@@ skipping 203 matching lines @@
                               env, mojo_shell_child_path)),
                           parameters));
 
   InitializeLogging();
 
   InitializeRedirection();
 
   // We want ~MessageLoop to happen prior to ~Context. Initializing
   // LazyInstances is akin to stack-allocating objects; their destructors
   // will be invoked first-in-last-out.
-  Context* shell_context = new Context();
+  Context* shell_context = new Context(tracer);
   shell_context->SetShellFileRoot(base::FilePath(
       base::android::ConvertJavaStringToUTF8(env, j_local_apps_directory)));
   g_internal_data.Get().context.reset(shell_context);
 
   g_internal_data.Get().java_message_loop.reset(new base::MessageLoopForUI);
   base::MessageLoopForUI::current()->Start();
 
   if (trace_startup) {
     g_internal_data.Get().java_message_loop->PostDelayedTask(
         FROM_HERE,
@@ skipping 35 matching lines @@
   std::string url = base::android::ConvertJavaStringToUTF8(env, jurl);
   g_internal_data.Get().shell_task_runner->PostTask(
       FROM_HERE, base::Bind(&EmbedApplicationByURL, context, url));
 }
 
 bool RegisterShellMain(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace shell