[compiler] Move tracing from backends to compiler.

src/compiler/pipeline.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/pipeline.h"
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
 
 #include "src/base/adapters.h"
@@ skipping 462 matching lines @@
   Zone* zone() { return zone_scope_.zone(); }
 
  private:
   PhaseScope phase_scope_;
   ZonePool::Scope zone_scope_;
 };
 
 class PipelineCompilationJob : public OptimizedCompileJob {
  public:
   explicit PipelineCompilationJob(CompilationInfo* info)
-      : OptimizedCompileJob(info) {}
+      : OptimizedCompileJob(info, "TurboFan") {}
 
  protected:
   virtual Status CreateGraphImpl();
   virtual Status OptimizeGraphImpl();
   virtual Status GenerateCodeImpl();
 };
 
 PipelineCompilationJob::Status PipelineCompilationJob::CreateGraphImpl() {
-  if (FLAG_trace_opt) {
-    OFStream os(stdout);
-    os << "[compiling method " << Brief(*info()->closure())
-       << " using TurboFan";
-    if (info()->is_osr()) os << " OSR";
-    os << "]" << std::endl;
-  }
-
   if (info()->shared_info()->asm_function()) {
     if (info()->osr_frame()) info()->MarkAsFrameSpecializing();
     info()->MarkAsFunctionContextSpecializing();
   } else {
     if (!FLAG_always_opt) {
       info()->MarkAsBailoutOnUninitialized();
     }
     if (FLAG_native_context_specialization) {
       info()->MarkAsNativeContextSpecializing();
       info()->MarkAsTypingEnabled();
@@ skipping 1076 matching lines @@
   }
 
   data->DeleteRegisterAllocationZone();
 }
 
 Isolate* Pipeline::isolate() const { return info()->isolate(); }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8