1 files changed, 10 insertions, 4 deletions
diff --git a/WebCore/html/RangeInputType.cpp b/WebCore/html/RangeInputType.cpp
index ad47f14..50520cd 100644
--- a/WebCore/html/RangeInputType.cpp
+++ b/WebCore/html/RangeInputType.cpp
@@ -55,6 +55,11 @@ PassOwnPtr<InputType> RangeInputType::create(HTMLInputElement* element)
     return adoptPtr(new RangeInputType(element));
 }
 
+bool RangeInputType::isRangeControl() const
+{
+    return true;
+}
+
 const AtomicString& RangeInputType::formControlType() const
 {
     return InputTypeNames::range();
@@ -143,6 +148,9 @@ bool RangeInputType::handleKeydownEvent(KeyboardEvent* event)
         double step = (max - min) / 100;
         double current = parseToDouble(element()->value(), numeric_limits<double>::quiet_NaN());
         ASSERT(isfinite(current));
+        // Stepping-up and -down for step="any" are special cases for type="range" from renderer for convenient.
+        // No stepping normally for step="any". They cannot be handled by stepUp()/stepDown()/stepUpFromRenderer().
+        // So calculating values stepped-up or -down here.
         double newValue;
         if (key == "Up" || key == "Right") {
             newValue = current + step;
@@ -159,10 +167,8 @@ bool RangeInputType::handleKeydownEvent(KeyboardEvent* event)
         }
     } else {
         int stepMagnification = (key == "Up" || key == "Right") ? 1 : -1;
-        String lastStringValue = element()->value();
-        element()->stepUp(stepMagnification, ec);
-        if (lastStringValue != element()->value())
-            element()->dispatchFormControlChangeEvent();
+        // Reasonable stepping-up/-down by stepUpFromRenderer() unless step="any"
+        element()->stepUpFromRenderer(stepMagnification);
     }
     event->setDefaultHandled();
     return true;