Bug 939775 - Remove UpdateTextFragmentTrees and nsSVGMutationObserver. r=dholbert

layout/svg/nsSVGOuterSVGFrame.cpp

@@ -14,7 +14,6 @@
 #include "nsIInterfaceRequestorUtils.h"
 #include "nsIObjectLoadingContent.h"
 #include "nsRenderingContext.h"
-#include "nsStubMutationObserver.h"
 #include "nsSVGIntegrationUtils.h"
 #include "nsSVGForeignObjectFrame.h"
 #include "mozilla/dom/SVGSVGElement.h"
@@ -24,53 +23,6 @@
 using namespace mozilla;
 using namespace mozilla::dom;
 
-class nsSVGMutationObserver : public nsStubMutationObserver
-{
-public:
-  // nsIMutationObserver interface
-  NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
-
-  // nsISupports interface:
-  NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
-private:
-  NS_IMETHOD_(nsrefcnt) AddRef() { return 1; }
-  NS_IMETHOD_(nsrefcnt) Release() { return 1; }
-
-  static void UpdateTextFragmentTrees(nsIFrame *aFrame);
-};
-
-//----------------------------------------------------------------------
-// nsISupports methods
-
-NS_INTERFACE_MAP_BEGIN(nsSVGMutationObserver)
-  NS_INTERFACE_MAP_ENTRY(nsIMutationObserver)
-NS_INTERFACE_MAP_END
-
-static nsSVGMutationObserver sSVGMutationObserver;
-
-//----------------------------------------------------------------------
-// nsIMutationObserver methods
-
-void
-nsSVGMutationObserver::AttributeChanged(nsIDocument* aDocument,
-                                        Element* aElement,
-                                        int32_t aNameSpaceID,
-                                        nsIAtom* aAttribute,
-                                        int32_t aModType)
-{
-  if (aNameSpaceID != kNameSpaceID_XML || aAttribute != nsGkAtoms::space) {
-    return;
-  }
-
-  nsIFrame* frame = aElement->GetPrimaryFrame();
-  if (!frame) {
-    return;
-  }
-
-  // if not, are there text elements amongst its descendents
-  UpdateTextFragmentTrees(frame);
-}
-
 //----------------------------------------------------------------------
 // Implementation helpers
 
@@ -101,16 +53,6 @@ nsSVGOuterSVGFrame::UnregisterForeignObject(nsSVGForeignObjectFrame* aFrame)
   return mForeignObjectHash->RemoveEntry(aFrame);
 }
 
-void
-nsSVGMutationObserver::UpdateTextFragmentTrees(nsIFrame *aFrame)
-{
-  nsIFrame* kid = aFrame->GetFirstPrincipalChild();
-  while (kid) {
-    UpdateTextFragmentTrees(kid);
-    kid = kid->GetNextSibling();
-  }
-}
-
 //----------------------------------------------------------------------
 // Implementation
 
@@ -165,9 +107,6 @@ nsSVGOuterSVGFrame::Init(nsIContent* aContent,
     if (doc->GetRootElement() == mContent) {
       mIsRootContent = true;
     }
-    // sSVGMutationObserver has the same lifetime as the document so does
-    // not need to be removed
-    doc->AddMutationObserverUnlessExists(&sSVGMutationObserver);
   }
 }