Assign thread name to in_proc renderer and gpu thread.

content/renderer/in_process_renderer_thread.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 "content/renderer/in_process_renderer_thread.h"
 
 #include "content/renderer/render_process.h"
 #include "content/renderer/render_process_impl.h"
 #include "content/renderer/render_thread_impl.h"
 
+#if defined(OS_ANDROID)
+#include "base/android/jni_android.h"
+#endif
+
 namespace content {
 
 InProcessRendererThread::InProcessRendererThread(
     const InProcessChildThreadParams& params)
     : Thread("Chrome_InProcRendererThread"), params_(params) {
 }
 
 InProcessRendererThread::~InProcessRendererThread() {
   Stop();
 }
 
 void InProcessRendererThread::Init() {
+  // Call AttachCurrentThreadWithName, before any other AttachCurrentThread()
+  // calls. The latter causes Java VM to assign Thread-??? to the thread name.
+  // Please note calls to AttachCurrentThreadWithName after AttachCurrentThread
+  // will not change the thread name kept in Java VM.
+#if defined(OS_ANDROID)
+  base::android::AttachCurrentThreadWithName(thread_name());
+#endif
   render_process_.reset(new RenderProcessImpl());
   RenderThreadImpl::Create(params_);
 }
 
 void InProcessRendererThread::CleanUp() {
   render_process_.reset();
 
   // It's a little lame to manually set this flag.  But the single process
   // RendererThread will receive the WM_QUIT.  We don't need to assert on
   // this thread, so just force the flag manually.
   // If we want to avoid this, we could create the InProcRendererThread
   // directly with _beginthreadex() rather than using the Thread class.
   // We used to set this flag in the Init function above. However there
   // other threads like WebThread which are created by this thread
   // which resets this flag. Please see Thread::StartWithOptions. Setting
   // this flag to true in Cleanup works around these problems.
   SetThreadWasQuitProperly(true);
 }
 
 base::Thread* CreateInProcessRendererThread(
     const InProcessChildThreadParams& params) {
   return new InProcessRendererThread(params);
 }
 
 }  // namespace content