Send SIGPROF signals on the profiler event processor thread

src/platform-macos.cc

Index: src/platform-macos.cc
diff --git a/src/platform-macos.cc b/src/platform-macos.cc
index fde5217a78ddd7fac4ff8a52937b423fca8a8c98..79139811c2d703dd63c1c83603baea674a2d6f57 100644
--- a/src/platform-macos.cc
+++ b/src/platform-macos.cc
@@ -922,4 +922,21 @@ void Sampler::Stop() {
 }
 
 
+bool Sampler::CanSampleOnProfilerEventsProcessorThread() {
+  return false;
+}
+
+
+void Sampler::DoSample() {
+}
+
+
+void Sampler::StartProfiling() {
+}
+
+
+void Sampler::StopProfiling() {
+}
+
+
 } }  // namespace v8::internal