[profiler] Add two CpuProfileNode API functions to allow thread safe access to the node.

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index fc63c2c3163c732bf90d9f24bb741c98eddc56dc..8eb0f2d55c51f475f0d923400a0e40ef64d3ba0f 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -8579,6 +8579,10 @@ Local<String> CpuProfileNode::GetFunctionName() const {
   }
 }
 
+const char* CpuProfileNode::GetFunctionNameStr() const {
+  const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
+  return node->entry()->name();
+}
 
 int CpuProfileNode::GetScriptId() const {
   const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
@@ -8586,7 +8590,6 @@ int CpuProfileNode::GetScriptId() const {
   return entry->script_id();
 }
 
-
 Local<String> CpuProfileNode::GetScriptResourceName() const {
   const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
   i::Isolate* isolate = node->isolate();
@@ -8594,6 +8597,10 @@ Local<String> CpuProfileNode::GetScriptResourceName() const {
       node->entry()->resource_name()));
 }
 
+const char* CpuProfileNode::GetScriptResourceNameStr() const {
+  const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
+  return node->entry()->resource_name();
+}
 
 int CpuProfileNode::GetLineNumber() const {
   return reinterpret_cast<const i::ProfileNode*>(this)->entry()->line_number();