Implement AggregatableHistogramTimer and use it to measure how much time

src/compiler.cc

 // Copyright 2012 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/v8.h"
 
 #include "src/compiler.h"
 
 #include "src/ast-numbering.h"
 #include "src/ast-this-access-visitor.h"
@@ skipping 922 matching lines @@
                              GetUnoptimizedCodeCommon(&info),
                              Code);
   return result;
 }
 
 
 MaybeHandle<Code> Compiler::GetLazyCode(Handle<JSFunction> function) {
   Isolate* isolate = function->GetIsolate();
   DCHECK(!isolate->has_pending_exception());
   DCHECK(!function->is_compiled());
+  AggregatedHistogramTimerScope timer(isolate->counters()->compile_lazy());
   // If the debugger is active, do not compile with turbofan unless we can
   // deopt from turbofan code.
   if (FLAG_turbo_asm && function->shared()->asm_function() &&
       (FLAG_turbo_deoptimization || !isolate->debug()->is_active())) {
     CompilationInfoWithZone info(function);
 
     VMState<COMPILER> state(isolate);
     PostponeInterruptsScope postpone(isolate);
 
     info.SetOptimizing(BailoutId::None(), handle(function->shared()->code()));
@@ skipping 626 matching lines @@
   AllowHandleDereference allow_deref;
   bool tracing_on = info()->IsStub()
       ? FLAG_trace_hydrogen_stubs
       : (FLAG_trace_hydrogen &&
          info()->closure()->PassesFilter(FLAG_trace_hydrogen_filter));
   return (tracing_on &&
       base::OS::StrChr(const_cast<char*>(FLAG_trace_phase), name_[0]) != NULL);
 }
 
 } }  // namespace v8::internal