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..fcaa786d0f6e2d767856dc9a3cc55ddc22ea64cd 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 length) const {
+  const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
+  return node->GetLineTicks(entries, length);
+}
+
+
 const char* CpuProfileNode::GetBailoutReason() const {
   const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
   return node->entry()->bailout_reason();