Blink does not respect input.selectionStart and input.selectionEnd for some cases

Source/core/html/forms/TextFieldInputType.cpp

Index: Source/core/html/forms/TextFieldInputType.cpp
diff --git a/Source/core/html/forms/TextFieldInputType.cpp b/Source/core/html/forms/TextFieldInputType.cpp
index beb8cd5bfc56b9c21268ca2fe4378d2270542a3b..132c896d28f9f891528d9013e5209af6fd558930 100644
--- a/Source/core/html/forms/TextFieldInputType.cpp
+++ b/Source/core/html/forms/TextFieldInputType.cpp
@@ -160,10 +160,14 @@ void TextFieldInputType::setValue(const String& sanitizedValue, bool valueChange
         input->updateView();
 
     unsigned max = visibleValue().length();
-    if (input->focused())
-        input->setSelectionRange(max, max);
-    else
-        input->cacheSelectionInResponseToSetValue(max);
+    if (input->focused()) {
+        if (input->selectionStart() != input->selectionEnd())
+            input->setSelectionRange(input->selectionStart(), input->selectionEnd());
+        else
+            input->setSelectionRange(max, max);
+    } else {
+        input->setSelectionRange(input->selectionStart(), input->selectionEnd());

[yosin_UTC9, 2014/07/03 01:58:36]

Why do we need to set same value to input field selection?

It seems we should to same thing for TEXTAREA.

[harpreet.sk, 2014/07/04 13:50:27]

In case if input field is focused and selection is caret and we are setting
value then caret should so move to the end of text

+    }
 
     if (!valueChanged)
         return;