Revert recent CPU profiler changes because they broke --prof.

src/platform-solaris.cc

Index: src/platform-solaris.cc
diff --git a/src/platform-solaris.cc b/src/platform-solaris.cc
index 36d89e6d12a8c750c9cda23f5d7426adc1ef95da..4248ea214faa9b7d2c23ec4527d668d4ce542e2c 100644
--- a/src/platform-solaris.cc
+++ b/src/platform-solaris.cc
@@ -669,8 +669,9 @@ static void ProfilerSignalHandler(int signal, siginfo_t* info, void* context) {
   Sampler* sampler = isolate->logger()->sampler();
   if (sampler == NULL || !sampler->IsActive()) return;
 
-  TickSample* sample = CpuProfiler::StartTickSampleEvent(isolate);
-  if (sample == NULL) return;
+  TickSample sample_obj;
+  TickSample* sample = CpuProfiler::TickSampleEvent(isolate);
+  if (sample == NULL) sample = &sample_obj;
 
   // Extracting the sample from the context is extremely machine dependent.
   ucontext_t* ucontext = reinterpret_cast<ucontext_t*>(context);
@@ -683,7 +684,6 @@ static void ProfilerSignalHandler(int signal, siginfo_t* info, void* context) {
 
   sampler->SampleStack(sample);
   sampler->Tick(sample);
-  CpuProfiler::FinishTickSampleEvent(isolate);
 }
 
 class Sampler::PlatformData : public Malloced {
@@ -887,11 +887,6 @@ Sampler::~Sampler() {
 }
 
 
-void Sampler::DoSample() {
-  // TODO(rogulenko): implement
-}
-
-
 void Sampler::Start() {
   ASSERT(!IsActive());
   SetActive(true);