[turbofan] Call frequencies for JSCallFunction and JSCallConstruct.

src/compiler/bytecode-graph-builder.h

Index: src/compiler/bytecode-graph-builder.h
diff --git a/src/compiler/bytecode-graph-builder.h b/src/compiler/bytecode-graph-builder.h
index d87fac9e8166f0ee00573c83f6c04eabe126aef0..f9d4fc5b74c0e7308d25498dfac944accc51e93c 100644
--- a/src/compiler/bytecode-graph-builder.h
+++ b/src/compiler/bytecode-graph-builder.h
@@ -151,6 +151,10 @@ class BytecodeGraphBuilder {
   // type feedback.
   CompareOperationHint GetCompareOperationHint();
 
+  // Helper function to compute call frequency from the recorded type
+  // feedback.
+  float ComputeCallFrequency() const;
+
   // Control flow plumbing.
   void BuildJump();
   void BuildJumpIf(Node* condition);