bug 1155829 - declare MaiAtkObject in nsMai.h r=yzen

Next we will start adding methods to it that are used outside
AccessibleWrap.cpp.

accessible/atk/AccessibleWrap.cpp

@@ -123,28 +123,12 @@ static const GInterfaceInfo atk_if_infos[] = {
      (GInterfaceFinalizeFunc) nullptr, nullptr}
 };
 
-/**
- * This MaiAtkObject is a thin wrapper, in the MAI namespace, for AtkObject
- */
-struct MaiAtkObject
-{
-  AtkObject parent;
-  /*
-   * The AccessibleWrap whose properties and features are exported
-   * via this object instance.
-   */
-  uintptr_t accWrap;
-
-  /*
-   * Shutdown this AtkObject.
-   */
-  void Shutdown();
-};
-
 // This is or'd with the pointer in MaiAtkObject::accWrap if the wrap-ee is a
 // proxy.
 static const uintptr_t IS_PROXY = 1;
 
+static GQuark quark_mai_hyperlink = 0;
+
 void
 MaiAtkObject::Shutdown()
 {
@@ -225,8 +209,6 @@ static const char * GetUniqueMaiAtkTypeName(uint16_t interfacesBits);
 
 static gpointer parent_class = nullptr;
 
-static GQuark quark_mai_hyperlink = 0;
-
 GType
 mai_atk_object_get_type(void)
 {
@@ -270,7 +252,7 @@ AccessibleWrap::ShutdownAtkObject()
   if (!mAtkObject)
     return;
 
-  MOZ_ASSERT(IS_MAI_OBJECT(mAtkObject));
+  NS_ASSERTION(IS_MAI_OBJECT(mAtkObject), "wrong type of atk object");
   if (IS_MAI_OBJECT(mAtkObject))
     MAI_ATK_OBJECT(mAtkObject)->Shutdown();
 

accessible/atk/nsMai.h

@@ -51,4 +51,22 @@ IsAtkVersionAtLeast(int aMajor, int aMinor)
          (aMajor == atkMajorVersion && aMinor <= atkMinorVersion);
 }
 
+/**
+ * This MaiAtkObject is a thin wrapper, in the MAI namespace, for AtkObject
+ */
+struct MaiAtkObject
+{
+  AtkObject parent;
+  /*
+   * The AccessibleWrap whose properties and features are exported
+   * via this object instance.
+   */
+  uintptr_t accWrap;
+
+  /*
+   * Shutdown this AtkObject.
+   */
+  void Shutdown();
+};
+
 #endif /* __NS_MAI_H__ */