Allow nested compile-script histogram scopes.

R=bmeurer@chromium.org
BUG=chromium:449959
LOG=N

Review URL: https://codereview.chromium.org/822823003

Cr-Commit-Position: refs/heads/master@{#26128}

src/compiler.cc

@@ -1263,7 +1263,7 @@ Handle<SharedFunctionInfo> Compiler::CompileScript(
     v8::Extension* extension, ScriptData** cached_data,
     ScriptCompiler::CompileOptions compile_options, NativesFlag natives) {
   Isolate* isolate = source->GetIsolate();
-  HistogramTimerScope total(isolate->counters()->compile_script());
+  HistogramTimerScope total(isolate->counters()->compile_script(), true);
 
   if (compile_options == ScriptCompiler::kNoCompileOptions) {
     cached_data = NULL;