Make sure CPU profiler collects a sample on start.

BUG=369035
LOG=N
R=bmeurer@chromium.org, yurys@chromium.org

Review URL: https://codereview.chromium.org/263883008

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21157 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/cpu-profiler.cc

@@ -418,7 +418,10 @@ void CpuProfiler::StartProfiling(String* title, bool record_samples) {
 
 
 void CpuProfiler::StartProcessorIfNotStarted() {
-  if (processor_ == NULL) {
+  if (processor_ != NULL) {
+    processor_->AddCurrentStack(isolate_);
+    return;
+  }
   Logger* logger = isolate_->logger();
   // Disable logging when using the new implementation.
   saved_is_logging_ = logger->is_logging_;
@@ -441,7 +444,6 @@ void CpuProfiler::StartProcessorIfNotStarted() {
   sampler->IncreaseProfilingDepth();
   processor_->AddCurrentStack(isolate_);
   processor_->StartSynchronously();
-  }
 }