Remove the blocking touch handlers for the input[type=range] and add touch-action instead

third_party/WebKit/Source/core/html/HTMLInputElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLInputElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLInputElement.cpp b/third_party/WebKit/Source/core/html/HTMLInputElement.cpp
index dd60325e359704461bc601ac3a7ba95e1048314c..8fba3d920ae94c0f425b03a258f327a8a3d38cbf 100644
--- a/third_party/WebKit/Source/core/html/HTMLInputElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLInputElement.cpp
@@ -113,10 +113,10 @@ HTMLInputElement::HTMLInputElement(Document& document, HTMLFormElement* form, bo
     , m_parsingInProgress(createdByParser)
     , m_valueAttributeWasUpdatedAfterParsing(false)
     , m_canReceiveDroppedFiles(false)
-    , m_hasTouchEventHandler(false)
     , m_shouldRevealPassword(false)
     , m_needsToUpdateViewValue(true)
     , m_isPlaceholderVisible(false)
+    , m_touchEventHandlerType(NoHandler)
     // |m_inputType| is lazily created when constructed by the parser to avoid
     // constructing unnecessarily a text inputType and its shadow subtree, just
     // to destroy them when the |type| attribute gets set by the parser to
@@ -405,18 +405,18 @@ void HTMLInputElement::updateTouchEventHandlerRegistry()
 {
     ASSERT(m_inputTypeView);
 
-    bool hasTouchEventHandler = m_inputTypeView->hasTouchEventHandler();
-    if (hasTouchEventHandler == !!m_hasTouchEventHandler)
+    TouchHandlerType touchEventHandlerType = m_inputTypeView->touchEventHandlerType();
+    if (touchEventHandlerType == m_touchEventHandlerType)
         return;
     // If the Document is being or has been stopped, don't register any handlers.
     if (document().frameHost() && document().lifecycle().state() < DocumentLifecycle::Stopping) {
         EventHandlerRegistry& registry = document().frameHost()->eventHandlerRegistry();
         // TODO(dtapuska): Make this passive touch listener see crbug.com/584438
-        if (hasTouchEventHandler)
+        if (touchEventHandlerType == Passive)
             registry.didAddEventHandler(*this, EventHandlerRegistry::TouchStartOrMoveEventBlocking);

[majidvp, 2016/08/04 15:20:36]

The idea is to use TouchStartOrMoveEventPassive here.

         else
             registry.didRemoveEventHandler(*this, EventHandlerRegistry::TouchStartOrMoveEventBlocking);
-        m_hasTouchEventHandler = hasTouchEventHandler;
+        m_touchEventHandlerType = touchEventHandlerType;
     }
 }
 
@@ -1161,7 +1161,7 @@ void HTMLInputElement::defaultEventHandler(Event* evt)
             return;
     }
 
-    if (evt->isTouchEvent() && m_inputTypeView->hasTouchEventHandler()) {
+    if (evt->isTouchEvent() && m_inputTypeView->touchEventHandlerType() == Passive) {
         m_inputTypeView->handleTouchEvent(toTouchEvent(evt));
         if (evt->defaultHandled())
             return;
@@ -1514,7 +1514,7 @@ void HTMLInputElement::didMoveToNewDocument(Document& oldDocument)
 void HTMLInputElement::removeAllEventListeners()
 {
     HTMLTextFormControlElement::removeAllEventListeners();
-    m_hasTouchEventHandler = false;
+    m_touchEventHandlerType = NoHandler;
 }
 
 bool HTMLInputElement::recalcWillValidate() const