Test aria-pressed=mixed on windows

content/browser/accessibility/browser_accessibility.h

Index: content/browser/accessibility/browser_accessibility.h
diff --git a/content/browser/accessibility/browser_accessibility.h b/content/browser/accessibility/browser_accessibility.h
index 1d25cc4129f53fe2c64cb28d769142474823e469..725b94f5785eb55f522d5c6295914fa4d145717e 100644
--- a/content/browser/accessibility/browser_accessibility.h
+++ b/content/browser/accessibility/browser_accessibility.h
@@ -283,27 +283,6 @@ class CONTENT_EXPORT BrowserAccessibility : public ui::AXPlatformNodeDelegate {
   bool GetIntListAttribute(ui::AXIntListAttribute attribute,
                            std::vector<int32_t>* value) const;
 
-  // Retrieve the value of a html attribute from the attribute map and
-  // returns true if found.
-  bool GetHtmlAttribute(const char* attr, base::string16* value) const;
-  bool GetHtmlAttribute(const char* attr, std::string* value) const;
-
-  // Utility method to handle special cases for ARIA booleans, tristates and
-  // booleans which have a "mixed" state.
-  //
-  // Warning: the term "Tristate" is used loosely by the spec and here,
-  // as some attributes support a 4th state.
-  //
-  // The following attributes are appropriate to use with this method:
-  // aria-selected  (selectable)
-  // aria-grabbed   (grabbable)
-  // aria-expanded  (expandable)
-  // aria-pressed   (toggleable/pressable) -- supports 4th "mixed" state
-  // aria-checked   (checkable) -- supports 4th "mixed state"
-  bool GetAriaTristate(const char* attr_name,
-                       bool* is_defined,
-                       bool* is_mixed) const;
-
   base::string16 GetFontFamily() const;
   base::string16 GetLanguage() const;