Revert of Add AX role ,'AXDescriptionList', for dl element. (patchset #2

 id:20001 of https://codereview.chromium.org/609793002/)

Reason for revert:
This patch, probably, broke AccesibilityDl test on Mac
http://build.chromium.org/p/chromium.webkit/builders/Win7%20Tests/builds/5898

Original issue's description:
> Add AX role ,'AXDescriptionList', for dl element.
> 
> There are related patches from WebKit, the patch written by
> James Craig<james@cookiecrook.com> wkrev.com/147520 and the
> patch written by Mario Sanchez Prada  <mario.prada@samsung.com>
> wkrev.com/161492.
> And I modified them based on the current blink.
> 
> BUG=226505
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=182813

TBR=dmazzoni@chromium.org,je_julie.kim@samsung.com
NOTREECHECKS=true
NOTRY=true
BUG=226505

Review URL: https://codereview.chromium.org/616553002

git-svn-id: svn://svn.chromium.org/blink/trunk@182847 bbb929c8-8fbe-4397-9dbb-9b2b20218538

Source/core/accessibility/AXList.cpp

@@ -56,20 +56,4 @@ bool AXList::computeAccessibilityIsIgnored() const
     return accessibilityIsIgnoredByDefault();
 }
 
-bool AXList::isDescriptionList() const
-{
-    if (!m_renderer)
-        return false;
-
-    Node* node = m_renderer->node();
-    return node && node->hasTagName(dlTag);
-}
-
-AccessibilityRole AXList::roleValue() const
-{
-    if (isDescriptionList())
-        return DescriptionListRole;
-
-    return ListRole;
-}
 } // namespace blink

Source/core/accessibility/AXList.h

@@ -43,9 +43,8 @@ class AXList FINAL : public AXRenderObject {
 
     virtual bool isList() const OVERRIDE { return true; }
 
-    virtual AccessibilityRole roleValue() const OVERRIDE FINAL;
+    virtual AccessibilityRole roleValue() const OVERRIDE { return ListRole; }
 private:
-    bool isDescriptionList() const;
     virtual bool computeAccessibilityIsIgnored() const OVERRIDE;
 };
 

Source/core/accessibility/AXNodeObject.cpp

@@ -33,7 +33,6 @@
 #include "core/accessibility/AXObjectCache.h"
 #include "core/dom/NodeTraversal.h"
 #include "core/dom/Text.h"
-#include "core/html/HTMLDListElement.h"
 #include "core/html/HTMLFieldSetElement.h"
 #include "core/html/HTMLFrameElementBase.h"
 #include "core/html/HTMLInputElement.h"
@@ -237,8 +236,6 @@ AccessibilityRole AXNodeObject::determineAccessibilityRole()
         return ParagraphRole;
     if (isHTMLLabelElement(*node()))
         return LabelRole;
-    if (isHTMLDListElement(*node()))
-        return DescriptionListRole;
     if (node()->isElementNode() && node()->hasTagName(figcaptionTag))
         return FigcaptionRole;
     if (node()->isElementNode() && node()->hasTagName(figureTag))

Source/core/accessibility/AXObject.h

@@ -80,7 +80,6 @@ enum AccessibilityRole {
     ContentInfoRole,
     DefinitionRole,
     DescriptionListDetailRole,
-    DescriptionListRole,
     DescriptionListTermRole,
     DetailsRole,
     DialogRole,

Source/core/accessibility/AXRenderObject.cpp

@@ -348,9 +348,6 @@ AccessibilityRole AXRenderObject::determineAccessibilityRole()
     if (node && node->hasTagName(ddTag))
         return DescriptionListDetailRole;
 
-    if (node && node->hasTagName(dlTag))
-        return DescriptionListRole;
-
     if (node && node->hasTagName(dtTag))
         return DescriptionListTermRole;
 

Source/web/AssertMatchingEnums.cpp

@@ -192,7 +192,6 @@ COMPILE_ASSERT_MATCHING_ENUM(WebAXRoleComplementary, ComplementaryRole);
 COMPILE_ASSERT_MATCHING_ENUM(WebAXRoleContentInfo, ContentInfoRole);
 COMPILE_ASSERT_MATCHING_ENUM(WebAXRoleDefinition, DefinitionRole);
 COMPILE_ASSERT_MATCHING_ENUM(WebAXRoleDescriptionListDetail, DescriptionListDetailRole);
-COMPILE_ASSERT_MATCHING_ENUM(WebAXRoleDescriptionList, DescriptionListRole);
 COMPILE_ASSERT_MATCHING_ENUM(WebAXRoleDescriptionListTerm, DescriptionListTermRole);
 COMPILE_ASSERT_MATCHING_ENUM(WebAXRoleDetails, DetailsRole);
 COMPILE_ASSERT_MATCHING_ENUM(WebAXRoleDialog, DialogRole);

public/web/WebAXEnums.h

@@ -92,7 +92,6 @@ enum WebAXRole {
     WebAXRoleContentInfo,
     WebAXRoleDefinition,
     WebAXRoleDescriptionListDetail,
-    WebAXRoleDescriptionList,
     WebAXRoleDescriptionListTerm,
     WebAXRoleDetails,
     WebAXRoleDialog,