Assign thread name to in_proc renderer and gpu thread.

content/renderer/in_process_renderer_thread.cc

Index: content/renderer/in_process_renderer_thread.cc
diff --git a/content/renderer/in_process_renderer_thread.cc b/content/renderer/in_process_renderer_thread.cc
index 8b4b333bb93580363a4f7bb5e7d693152856c69e..94a41e61581607c31a4680a675232dfe4703255c 100644
--- a/content/renderer/in_process_renderer_thread.cc
+++ b/content/renderer/in_process_renderer_thread.cc
@@ -8,6 +8,10 @@
 #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(
@@ -20,6 +24,13 @@ InProcessRendererThread::~InProcessRendererThread() {
 }
 
 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_);
 }