Bug 1438193 - part11-3 CreateGroupInfo r=surkov

turn CreateGroupInfo into a const funcion

accessible/base/AccGroupInfo.cpp

@@ -10,7 +10,7 @@
 
 using namespace mozilla::a11y;
 
-AccGroupInfo::AccGroupInfo(Accessible* aItem, role aRole) :
+AccGroupInfo::AccGroupInfo(const Accessible* aItem, role aRole) :
   mPosInSet(0), mSetSize(0), mParent(nullptr), mItem(aItem), mRole(aRole)
 {
   MOZ_COUNT_CTOR(AccGroupInfo);

accessible/base/AccGroupInfo.h

@@ -42,7 +42,7 @@ public:
   /**
    * Create group info.
    */
-  static AccGroupInfo* CreateGroupInfo(Accessible* aAccessible)
+  static AccGroupInfo* CreateGroupInfo(const Accessible* aAccessible)
   {
     mozilla::a11y::role role = aAccessible->Role();
     if (role != mozilla::a11y::roles::ROW &&
@@ -75,7 +75,7 @@ public:
   static Accessible* NextItemTo(Accessible* aItem);
 
 protected:
-  AccGroupInfo(Accessible* aItem, a11y::role aRole);
+  AccGroupInfo(const Accessible* aItem, a11y::role aRole);
 
 private:
   AccGroupInfo() = delete;
@@ -104,7 +104,7 @@ private:
   uint32_t mPosInSet;
   uint32_t mSetSize;
   Accessible* mParent;
-  Accessible* mItem;
+  const Accessible* mItem;
   a11y::role mRole;
 };
 

accessible/base/nsAccUtils.cpp

@@ -73,7 +73,7 @@ nsAccUtils::SetAccGroupAttrs(nsIPersistentProperties *aAttributes,
 }
 
 int32_t
-nsAccUtils::GetDefaultLevel(Accessible* aAccessible)
+nsAccUtils::GetDefaultLevel(const Accessible* aAccessible)
 {
   roles::Role role = aAccessible->Role();
 
@@ -92,7 +92,7 @@ nsAccUtils::GetDefaultLevel(Accessible* aAccessible)
 }
 
 int32_t
-nsAccUtils::GetARIAOrDefaultLevel(Accessible* aAccessible)
+nsAccUtils::GetARIAOrDefaultLevel(const Accessible* aAccessible)
 {
   int32_t level = 0;
   nsCoreUtils::GetUIntAttr(aAccessible->GetContent(),

accessible/base/nsAccUtils.h

@@ -65,13 +65,13 @@ public:
   /**
    * Get default value of the level for the given accessible.
    */
-  static int32_t GetDefaultLevel(Accessible* aAcc);
+  static int32_t GetDefaultLevel(const Accessible* aAcc);
 
   /**
    * Return ARIA level value or the default one if ARIA is missed for the
    * given accessible.
    */
-  static int32_t GetARIAOrDefaultLevel(Accessible* aAccessible);
+  static int32_t GetARIAOrDefaultLevel(const Accessible* aAccessible);
 
   /**
    * Compute group level for nsIDOMXULContainerItemElement node.