Don't create redundant ThreadData for Worker Threads

base/threading/platform_thread_win.cc

Index: base/threading/platform_thread_win.cc
diff --git a/base/threading/platform_thread_win.cc b/base/threading/platform_thread_win.cc
index d5bd9bed08e7978714d989c2a3afcf4a135bed69..214acfe97a660f94bf2f9c81f4b1950a97b55e52 100644
--- a/base/threading/platform_thread_win.cc
+++ b/base/threading/platform_thread_win.cc
@@ -162,7 +162,7 @@ void PlatformThread::Sleep(TimeDelta duration) {
 }
 
 // static
-void PlatformThread::SetName(const std::string& name) {
+void PlatformThread::SetName(const std::string& name, bool is_worker_thread) {
   ThreadIdNameManager::GetInstance()->SetName(CurrentId(), name);
 
   // On Windows only, we don't need to tell the profiler about the "BrokerEvent"
@@ -172,7 +172,8 @@ void PlatformThread::SetName(const std::string& name) {
   // context, including setting up thread local storage, etc.  The performance
   // impact is not terrible, but there is no reason to do initialize it.
   if (name != "BrokerEvent")
-    tracked_objects::ThreadData::InitializeThreadContext(name);
+    tracked_objects::ThreadData::InitializeThreadContext(name,
+                                                         is_worker_thread);
 
   // The debugger needs to be around to catch the name in the exception.  If
   // there isn't a debugger, we are just needlessly throwing an exception.