[Autofill] Respect the autocomplete=off attribute.

components/autofill/core/common/autofill_util.cc

Index: components/autofill/core/common/autofill_util.cc
diff --git a/components/autofill/core/common/autofill_util.cc b/components/autofill/core/common/autofill_util.cc
index b2c3671daaa0bd70873e0e4c341545577c2998f9..135981692e3c95cf2e60591142cee45ca154425f 100644
--- a/components/autofill/core/common/autofill_util.cc
+++ b/components/autofill/core/common/autofill_util.cc
@@ -96,4 +96,12 @@ size_t GetTextSelectionStart(const base::string16& suggestion,
   return base::string16::npos;
 }
 
+bool IsDesktopPlatform() {
+#if defined(OS_ANDROID) || defined(OS_IOS)
+  return false;
+#else
+  return true;
+#endif
+}
+
 }  // namespace autofill