[Autofill/Autocomplete Feature] Substring matching instead of prefix matching.

components/autofill/content/renderer/form_autofill_util.h

Index: components/autofill/content/renderer/form_autofill_util.h
diff --git a/components/autofill/content/renderer/form_autofill_util.h b/components/autofill/content/renderer/form_autofill_util.h
index 1be05cdac08433fab3baf5dd2e293ea3d2af413c..bc78c49c7af7e6c2da0650a86f6b7701ebe12c67 100644
--- a/components/autofill/content/renderer/form_autofill_util.h
+++ b/components/autofill/content/renderer/form_autofill_util.h
@@ -176,6 +176,12 @@ bool IsWebElementEmpty(const blink::WebElement& element);
 // Return a gfx::RectF that is the bounding box for |element| scaled by |scale|.
 gfx::RectF GetScaledBoundingBox(float scale, blink::WebElement* element);
 
+// Previews the |input_element| with supplied |suggestion| and |user_input|.
+// |input_element| should not be null.

[please use gerrit instead, 2015/07/06 20:15:17]

Please add to the comment the reason why you don't use ->value() and
->suggestedValue() directly. For example:

// Not using input_element->value() and input_element->suggestedValue()
// directly because password manager sometimes does not set them.

It's a good idea to file a bug against password manager to always set suggested
value and link to it here. For example.

// http://crbug.com/XYZ

[Pritam Nikam, 2015/07/07 16:18:31]

Done.

Issue logged: http://crbug.com/507714

[please use gerrit instead, 2015/07/07 18:09:12]

Acknowledged.

+void PreviewSuggestion(const base::string16& suggestion,
+                       const base::string16& user_input,
+                       blink::WebFormControlElement* input_element);
+
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CONTENT_RENDERER_FORM_AUTOFILL_UTIL_H_