[compiler] Move tracing from backends to compiler.

src/crankshaft/hydrogen.cc

Index: src/crankshaft/hydrogen.cc
diff --git a/src/crankshaft/hydrogen.cc b/src/crankshaft/hydrogen.cc
index 747db8a8c7ed6b6c24126159a297656db99ebd3f..1d2b11ce42b3d83e02184bc95482d13b9f932856 100644
--- a/src/crankshaft/hydrogen.cc
+++ b/src/crankshaft/hydrogen.cc
@@ -132,14 +132,6 @@ HCompilationJob::Status HCompilationJob::CreateGraphImpl() {
     return AbortOptimization(kTooManyParametersLocals);
   }
 
-  if (FLAG_trace_opt) {
-    OFStream os(stdout);
-    os << "[compiling method " << Brief(*info()->closure())
-       << " using Crankshaft";
-    if (info()->is_osr()) os << " OSR";
-    os << "]" << std::endl;
-  }
-
   if (FLAG_trace_hydrogen) {
     isolate()->GetHTracer()->TraceCompilation(info());
   }