Refactor BasicBlock, no inheritance from GenericNode

src/basic-block-profiler.cc

 // Copyright 2014 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/basic-block-profiler.h"
 
 namespace v8 {
 namespace internal {
 
 BasicBlockProfiler::Data::Data(size_t n_blocks)
-    : n_blocks_(n_blocks), block_ids_(n_blocks_, -1), counts_(n_blocks_, 0) {}
+    : n_blocks_(n_blocks), block_ids_(n_blocks_), counts_(n_blocks_, 0) {}
 
 
 BasicBlockProfiler::Data::~Data() {}
 
 
 static void InsertIntoString(OStringStream* os, std::string* string) {
   string->insert(string->begin(), os->c_str(), &os->c_str()[os->size()]);
 }
 
 
 void BasicBlockProfiler::Data::SetCode(OStringStream* os) {
   InsertIntoString(os, &code_);
 }
 
 
 void BasicBlockProfiler::Data::SetFunctionName(OStringStream* os) {
   InsertIntoString(os, &function_name_);
 }
 
 
 void BasicBlockProfiler::Data::SetSchedule(OStringStream* os) {
   InsertIntoString(os, &schedule_);
 }
 
 
-void BasicBlockProfiler::Data::SetBlockId(size_t offset, int block_id) {
+void BasicBlockProfiler::Data::SetBlockId(size_t offset, size_t block_id) {
   DCHECK(offset < n_blocks_);
   block_ids_[offset] = block_id;
 }
 
 
 uint32_t* BasicBlockProfiler::Data::GetCounterAddress(size_t offset) {
   DCHECK(offset < n_blocks_);
   return &counts_[offset];
 }
 
@@ skipping 55 matching lines @@
   }
   os << endl;
   if (!d.code_.empty()) {
     os << d.code_.c_str() << endl;
   }
   return os;
 }
 
 }  // namespace internal
 }  // namespace v8