CPUProfiler: Improve line numbers support in profiler.

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index 221639e232c97d35659e0f50b44c970dabc5a239..7497f09d51979e50091d47b03e0523433d39168c 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -1200,9 +1200,9 @@ void Compiler::RecordFunctionCompilation(Logger::LogEventsAndTags tag,
     Handle<Code> code = info->code();
     if (*code == info->isolate()->builtins()->builtin(Builtins::kLazyCompile))
       return;
+    int line_num = GetScriptLineNumber(script, shared->start_position()) + 1;
+    USE(line_num);

[yurys, 2013/07/06 05:03:22]

It seems that you can drop this line as line_num is always used.

     if (script->name()->IsString()) {
-      int line_num = GetScriptLineNumber(script, shared->start_position()) + 1;
-      USE(line_num);
       PROFILE(info->isolate(),
               CodeCreateEvent(Logger::ToNativeByScript(tag, *script),
                               *code,
@@ -1216,7 +1216,8 @@ void Compiler::RecordFunctionCompilation(Logger::LogEventsAndTags tag,
                               *code,
                               *shared,
                               info,
-                              shared->DebugName()));
+                              info->isolate()->heap()->empty_string(),
+                              line_num));
     }
   }