[stubs] Extract ToInteger to CodeStubAssembler

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 bef001a2ad93cd6294d00eb39ebd0dd324d6197d..39c0fe690c8a9e27a031d5f831099189edb4c0d0 100644
--- a/src/code-stub-assembler.h
+++ b/src/code-stub-assembler.h
@@ -486,6 +486,9 @@ class CodeStubAssembler : public compiler::CodeAssembler {
   // Convert any object to a Number.
   compiler::Node* ToNumber(compiler::Node* context, compiler::Node* input);
 
+  // Convert any object to an Integer.
+  compiler::Node* ToInteger(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.
   template <typename T>