No need to start Ticker for Crankshaft

src/log.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1542 matching lines @@
 }
 
 
 // This function can be called when Log's mutex is acquired,
 // either from main or Profiler's thread.
 void Logger::LogFailure() {
   PauseProfiler();
 }
 
 
-bool Logger::IsProfilerSamplerActive() {
-  return ticker_->IsActive();
-}
-
-
 class EnumerateOptimizedFunctionsVisitor: public OptimizedFunctionVisitor {
  public:
   EnumerateOptimizedFunctionsVisitor(Handle<SharedFunctionInfo>* sfis,
                                      Handle<Code>* code_objects,
                                      int* count)
       : sfis_(sfis), code_objects_(code_objects), count_(count) { }
 
   virtual void EnterContext(Context* context) {}
   virtual void LeaveContext(Context* context) {}
 
@@ skipping 352 matching lines @@
     LogCompiledFunctions();
   }
 }
 
 
 Sampler* Logger::sampler() {
   return ticker_;
 }
 
 
-void Logger::EnsureTickerStarted() {
-  ASSERT(ticker_ != NULL);
-  if (!ticker_->IsActive()) ticker_->Start();
-}
-
-
-void Logger::EnsureTickerStopped() {
-  if (ticker_ != NULL && ticker_->IsActive()) ticker_->Stop();
-}
-
-
 FILE* Logger::TearDown() {
   if (!is_initialized_) return NULL;
   is_initialized_ = false;
 
   // Stop the profiler before closing the file.
   if (profiler_ != NULL) {
     profiler_->Disengage();
     delete profiler_;
     profiler_ = NULL;
   }
@@ skipping 59 matching lines @@
 void SamplerRegistry::RemoveActiveSampler(Sampler* sampler) {
   ASSERT(sampler->IsActive());
   ScopedLock lock(active_samplers_mutex);
   ASSERT(active_samplers_ != NULL);
   bool removed = active_samplers_->RemoveElement(sampler);
   ASSERT(removed);
   USE(removed);
 }
 
 } }  // namespace v8::internal