Autofill's "Clear Form" should clear only autofilled fields

components/autofill/content/renderer/form_cache.cc

Index: components/autofill/content/renderer/form_cache.cc
diff --git a/components/autofill/content/renderer/form_cache.cc b/components/autofill/content/renderer/form_cache.cc
index 716e895e03ac9b3fa4fc65622ab01965ccd8ef13..2b7765d8bd62621aa213b45a5a5335551108ed54 100644
--- a/components/autofill/content/renderer/form_cache.cc
+++ b/components/autofill/content/renderer/form_cache.cc
@@ -177,6 +177,10 @@ bool FormCache::ClearFormWithElement(const WebFormControlElement& element) {
     if (!control_element.isEnabled())
       continue;
 
+    // Don't clear field that was not autofilled
+    if (!control_element.isAutofilled())
+      continue;
+
     control_element.setAutofilled(false);
 
     WebInputElement* input_element = toWebInputElement(&control_element);