Extend CPU profiler with mapping ticks to source lines

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index e473540d4069561c0eb15c04230ea6926bf8afec..b46f7ab5861896387de58b4bf9ced25f2e59fd67 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -7063,6 +7063,19 @@ int CpuProfileNode::GetColumnNumber() const {
 }
 
 
+unsigned int CpuProfileNode::GetHitLineCount() const {
+  const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
+  return node->GetHitLineCount();
+}
+
+
+bool CpuProfileNode::GetLineTicks(LineTick* entries,
+                                  unsigned int number) const {
+  const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
+  return node->GetLineTicks(entries, number);
+}
+
+
 const char* CpuProfileNode::GetBailoutReason() const {
   const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
   return node->entry()->bailout_reason();