Allow new CPU profiling subsystem to coexist nicely with the old one.

src/cpu-profiler-inl.h

Index: src/cpu-profiler-inl.h
diff --git a/src/cpu-profiler-inl.h b/src/cpu-profiler-inl.h
index 0e833156caa6bb2958426664f6f1f186b0682d0f..665bbd797379d1e815601552f25e66ed894c0586 100644
--- a/src/cpu-profiler-inl.h
+++ b/src/cpu-profiler-inl.h
@@ -39,28 +39,39 @@ namespace v8 {
 namespace internal {
 
 void CodeCreateEventRecord::UpdateCodeMap(CodeMap* code_map) {
-    code_map->AddCode(start, entry, size);
+  code_map->AddCode(start, entry, size);
 }
 
 
 void CodeMoveEventRecord::UpdateCodeMap(CodeMap* code_map) {
-    code_map->MoveCode(from, to);
+  code_map->MoveCode(from, to);
 }
 
 
 void CodeDeleteEventRecord::UpdateCodeMap(CodeMap* code_map) {
-    code_map->DeleteCode(start);
+  code_map->DeleteCode(start);
 }
 
 
 void CodeAliasEventRecord::UpdateCodeMap(CodeMap* code_map) {
-    code_map->AddAlias(alias, start);
+  code_map->AddAlias(alias, start);
+}
+
+
+TickSampleEventRecord* TickSampleEventRecord::init(void* value) {
+  TickSampleEventRecord* result =
+      reinterpret_cast<TickSampleEventRecord*>(value);
+  result->filler = 1;  // != SamplingCircularQueue::kClear.

[Søren Thygesen Gjesse, 2010/04/12 06:56:28]

Please add 

ASSERT(result->filler = != SamplingCircularQueue::kClear);

[mnaganov (inactive), 2010/04/12 07:17:45]

Done.

+  // Init the required fields only.
+  result->sample.pc = NULL;
+  result->sample.frames_count = 0;
+  return result;
 }
 
 
 TickSample* ProfilerEventsProcessor::TickSampleEvent() {
   TickSampleEventRecord* evt =
-      TickSampleEventRecord::cast(ticks_buffer_.Enqueue());
+      TickSampleEventRecord::init(ticks_buffer_.Enqueue());
   evt->order = enqueue_order_;  // No increment!
   return &evt->sample;
 }