Use count-based profiling exclusively.

src/full-codegen.h

Index: src/full-codegen.h
diff --git a/src/full-codegen.h b/src/full-codegen.h
index 364f0c3536a7dae1aca8ba848e0810b86171d0dc..c25076a0b13e603940dee80af80bf7a0df205ebf 100644
--- a/src/full-codegen.h
+++ b/src/full-codegen.h
@@ -451,14 +451,13 @@ class FullCodeGenerator: public AstVisitor {
   // neither a with nor a catch context.
   void EmitDebugCheckDeclarationContext(Variable* variable);
 
-  // Platform-specific code for checking the stack limit at the back edge of
-  // a loop.
   // This is meant to be called at loop back edges, |back_edge_target| is
   // the jump target of the back edge and is used to approximate the amount
   // of code inside the loop.
-  void EmitStackCheck(IterationStatement* stmt, Label* back_edge_target);
-  // Record the OSR AST id corresponding to a stack check in the code.
-  void RecordStackCheck(BailoutId osr_ast_id);
+  void EmitBackEdgeBookkeeping(IterationStatement* stmt,
+                               Label* back_edge_target);
+  // Record the OSR AST id corresponding to a back edge in the code.
+  void RecordBackEdge(BailoutId osr_ast_id);
   // Emit a table of stack check ids and pcs into the code stream.  Return
   // the offset of the start of the table.
   unsigned EmitStackCheckTable();
@@ -817,6 +816,8 @@ class FullCodeGenerator: public AstVisitor {
   int module_index_;
   const ExpressionContext* context_;
   ZoneList<BailoutEntry> bailout_entries_;
+  // TODO(svenpanne) Rename this to something like back_edges_ and rename
+  // related functions accordingly.
   ZoneList<BailoutEntry> stack_checks_;
   ZoneList<TypeFeedbackCellEntry> type_feedback_cells_;
   int ic_total_count_;