Make V8 compilable with profiling support turned off.

src/log.cc

Index: src/log.cc
diff --git a/src/log.cc b/src/log.cc
index b8e3f05a47350ba0c71faffa6e2ac82103146eae..db9ff7a1f1e550d7bc357bdada508e2e7be4b88e 100644
--- a/src/log.cc
+++ b/src/log.cc
@@ -709,6 +709,7 @@ void Logger::SetterCallbackEvent(String* name, Address entry_point) {
 }
 
 
+#ifdef ENABLE_LOGGING_AND_PROFILING
 static const char* ComputeMarker(Code* code) {
   switch (code->kind()) {
     case Code::FUNCTION: return code->optimizable() ? "~" : "";
@@ -716,6 +717,7 @@ static const char* ComputeMarker(Code* code) {
     default: return "";
   }
 }
+#endif
 
 
 void Logger::CodeCreateEvent(LogEventsAndTags tag,
@@ -1577,13 +1579,17 @@ bool Logger::Setup() {
 
 
 void Logger::EnsureTickerStarted() {
+#ifdef ENABLE_LOGGING_AND_PROFILING
   ASSERT(ticker_ != NULL);
   if (!ticker_->IsActive()) ticker_->Start();
+#endif
 }
 
 
 void Logger::EnsureTickerStopped() {
+#ifdef ENABLE_LOGGING_AND_PROFILING
   if (ticker_ != NULL && ticker_->IsActive()) ticker_->Stop();
+#endif
 }