Introduce new compile histogram that includes parsing/caching.

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index 4cae3e65f864719f9dbbd4aa0283dffb56cf5f2a..0136e5ba16c5417c17f452cfbc2c4bd68d7c1ccd 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -1264,6 +1264,8 @@ 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());
+
   if (compile_options == ScriptCompiler::kNoCompileOptions) {
     cached_data = NULL;
   } else if (compile_options == ScriptCompiler::kProduceParserCache ||