Add support for TraceEvent before the native library is loaded.

content/browser/browser_main_loop.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 "content/browser/browser_main_loop.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 1214 matching lines @@
 
   std::string delay_str = command_line.GetSwitchValueASCII(
       switches::kTraceStartupDuration);
   int delay_secs = 5;
   if (!delay_str.empty() && !base::StringToInt(delay_str, &delay_secs)) {
     DLOG(WARNING) << "Could not parse --" << switches::kTraceStartupDuration
         << "=" << delay_str << " defaulting to 5 (secs)";
     delay_secs = 5;
   }
 
+#if defined(OS_ANDROID)
+  TracingControllerAndroid::SetupEarlyJavaTracing();
+#endif
+
   startup_trace_timer_.Start(FROM_HERE,
                              base::TimeDelta::FromSeconds(delay_secs),
                              this,
                              &BrowserMainLoop::EndStartupTracing);
 }
 
 void BrowserMainLoop::EndStartupTracing() {
   is_tracing_startup_ = false;
+
   TracingController::GetInstance()->DisableRecording(
       TracingController::CreateFileSink(
           startup_trace_file_,
           base::Bind(OnStoppedStartupTracing, startup_trace_file_)));
 }
 
 }  // namespace content