[builtins] Migrate ToNumber to TurboFan.

src/code-stub-assembler.h

Index: src/code-stub-assembler.h
diff --git a/src/code-stub-assembler.h b/src/code-stub-assembler.h
index 3ce4f8b7f0c8e7b099a83fb99dbb9b5564420e40..125d7c502579a0ae07349d1cd170dd944d13c8ed 100644
--- a/src/code-stub-assembler.h
+++ b/src/code-stub-assembler.h
@@ -412,6 +412,11 @@ class CodeStubAssembler : public compiler::CodeAssembler {
   // Convert a String to a Number.
   compiler::Node* StringToNumber(compiler::Node* context,
                                  compiler::Node* input);
+  // Convert a Non-Number object to a Number.
+  compiler::Node* NonNumberToNumber(compiler::Node* context,
+                                    compiler::Node* input);
+  // Convert any object to a Number.
+  compiler::Node* ToNumber(compiler::Node* context, compiler::Node* input);
 
   // Returns a node that contains a decoded (unsigned!) value of a bit
   // field |T| in |word32|. Returns result as an uint32 node.