[stubs] Port ToName stub 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 3a8a4d81d3aee74476a429d7cd3fabbb160dfc0e..b217353f7d47f8cd884e2d220d27681e37aa3125 100644
--- a/src/code-stub-assembler.h
+++ b/src/code-stub-assembler.h
@@ -429,6 +429,8 @@ class CodeStubAssembler : public compiler::CodeAssembler {
   // Convert a String to a Number.
   compiler::Node* StringToNumber(compiler::Node* context,
                                  compiler::Node* input);
+  // Convert an object to a name.
+  compiler::Node* ToName(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.