Fixed deadlock in the debugger agent in Windows.

src/platform-win32.cc

Index: src/platform-win32.cc
diff --git a/src/platform-win32.cc b/src/platform-win32.cc
index 898a2a3918c3816a2fcee171a2f025f80d2f649f..46af4dcdcd22b126fbaaa528bffbee655a0299ea 100644
--- a/src/platform-win32.cc
+++ b/src/platform-win32.cc
@@ -1511,6 +1511,7 @@ class Thread::PlatformData : public Malloced {
  public:
   explicit PlatformData(HANDLE thread) : thread_(thread) {}
   HANDLE thread_;
+  unsigned thread_id_;
 };
 
 
@@ -1554,13 +1555,15 @@ void Thread::Start() {
                      ThreadEntry,
                      this,
                      0,
-                     NULL));
+                     &data_->thread_id_));
 }
 
 
 // Wait for thread to terminate.
 void Thread::Join() {
-  WaitForSingleObject(data_->thread_, INFINITE);
+  if (data_->thread_id_ != GetCurrentThreadId()) {
+    WaitForSingleObject(data_->thread_, INFINITE);
+  }
 }