Do not autofill element when there is no autofill suggestion from profile

components/autofill/content/renderer/form_autofill_util.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/autofill/content/renderer/form_autofill_util.h"
 
 #include <map>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 563 matching lines @@
   // Preview input, textarea and select fields. For input fields, excludes
   // checkboxes and radio buttons, as there is no provision for
   // setSuggestedCheckedValue in WebInputElement.
   WebInputElement* input_element = toWebInputElement(field);
   if (IsTextInput(input_element) || IsMonthInput(input_element)) {
     // If the maxlength attribute contains a negative value, maxLength()
     // returns the default maxlength value.
     input_element->setSuggestedValue(
       data.value.substr(0, input_element->maxLength()));
     input_element->setAutofilled(true);
-  } else if (IsTextAreaElement(*field) || IsSelectElement(*field)) {
+  } else if (IsTextAreaElement(*field)) {
     field->setSuggestedValue(data.value);
     field->setAutofilled(true);
+  } else {
+    DCHECK(IsSelectElement(*field));
+    field->setSuggestedValue(data.value);

[Ilya Sherman, 2014/06/02 23:51:00]

We should only set the suggested value if the field is being autofilled.

+    if (data.is_autofilled)
+      field->setAutofilled(true);
   }
 
   if (is_initiating_node &&
       (IsTextInput(input_element) || IsTextAreaElement(*field))) {
     // Select the part of the text that the user didn't type.
     int start = field->value().length();
     int end = field->suggestedValue().length();
     field->setSelectionRange(start, end);
   }
 }
@@ skipping 581 matching lines @@
 
 gfx::RectF GetScaledBoundingBox(float scale, WebFormControlElement* element) {
   gfx::Rect bounding_box(element->boundsInViewportSpace());
   return gfx::RectF(bounding_box.x() * scale,
                     bounding_box.y() * scale,
                     bounding_box.width() * scale,
                     bounding_box.height() * scale);
 }
 
 }  // namespace autofill