Bug 937843 - Make some things in APZCCallbackHelper const. r=botond

widget/xpwidgets/APZCCallbackHelper.cpp

@@ -112,7 +112,7 @@ APZCCallbackHelper::UpdateSubFrame(nsIContent* aContent,
 }
 
 already_AddRefed<nsIDOMWindowUtils>
-APZCCallbackHelper::GetDOMWindowUtils(nsIDocument* aDoc)
+APZCCallbackHelper::GetDOMWindowUtils(const nsIDocument* aDoc)
 {
     nsCOMPtr<nsIDOMWindowUtils> utils;
     nsCOMPtr<nsIDOMWindow> window = aDoc->GetDefaultView();
@@ -123,7 +123,7 @@ APZCCallbackHelper::GetDOMWindowUtils(nsIDocument* aDoc)
 }
 
 already_AddRefed<nsIDOMWindowUtils>
-APZCCallbackHelper::GetDOMWindowUtils(nsIContent* aContent)
+APZCCallbackHelper::GetDOMWindowUtils(const nsIContent* aContent)
 {
     nsCOMPtr<nsIDOMWindowUtils> utils;
     nsIDocument* doc = aContent->GetCurrentDoc();
@@ -134,7 +134,7 @@ APZCCallbackHelper::GetDOMWindowUtils(nsIContent* aContent)
 }
 
 bool
-APZCCallbackHelper::GetScrollIdentifiers(nsIContent* aContent,
+APZCCallbackHelper::GetScrollIdentifiers(const nsIContent* aContent,
                                          uint32_t* aPresShellIdOut,
                                          FrameMetrics::ViewID* aViewIdOut)
 {

widget/xpwidgets/APZCCallbackHelper.h

@@ -43,15 +43,15 @@ public:
                                const FrameMetrics& aMetrics);
 
     /* Get the DOMWindowUtils for the window corresponding to the given document. */
-    static already_AddRefed<nsIDOMWindowUtils> GetDOMWindowUtils(nsIDocument* aDoc);
+    static already_AddRefed<nsIDOMWindowUtils> GetDOMWindowUtils(const nsIDocument* aDoc);
 
     /* Get the DOMWindowUtils for the window corresponding to the givent content
        element. This might be an iframe inside the tab, for instance. */
-    static already_AddRefed<nsIDOMWindowUtils> GetDOMWindowUtils(nsIContent* aContent);
+    static already_AddRefed<nsIDOMWindowUtils> GetDOMWindowUtils(const nsIContent* aContent);
 
     /* Get the presShellId and view ID for the given content element, if they can be
        found. Returns false if the values could not be found, true if they could. */
-    static bool GetScrollIdentifiers(nsIContent* aContent,
+    static bool GetScrollIdentifiers(const nsIContent* aContent,
                                      uint32_t* aPresShellIdOut,
                                      FrameMetrics::ViewID* aViewIdOut);
 };