Merge 6006:6095 from bleeding_edge to experimental/gc branch.

src/top.cc

Index: src/top.cc
===================================================================
--- src/top.cc	(revision 6095)
+++ src/top.cc	(working copy)
@@ -40,7 +40,9 @@
 namespace v8 {
 namespace internal {
 
+#ifdef ENABLE_LOGGING_AND_PROFILING
 Semaphore* Top::runtime_profiler_semaphore_ = NULL;
+#endif
 ThreadLocalTop Top::thread_local_;
 Mutex* Top::break_access_ = OS::CreateMutex();
 
@@ -277,8 +279,10 @@
 void Top::Initialize() {
   CHECK(!initialized);
 
+#ifdef ENABLE_LOGGING_AND_PROFILING
   ASSERT(runtime_profiler_semaphore_ == NULL);
   runtime_profiler_semaphore_ = OS::CreateSemaphore(0);
+#endif
 
   InitializeThreadLocal();
 
@@ -297,8 +301,10 @@
 
 void Top::TearDown() {
   if (initialized) {
+#ifdef ENABLE_LOGGING_AND_PROFILING
     delete runtime_profiler_semaphore_;
     runtime_profiler_semaphore_ = NULL;
+#endif
 
     // Remove the external reference to the preallocated stack memory.
     if (preallocated_message_space != NULL) {