diff --git a/image/src/SVGDocumentWrapper.cpp b/image/src/SVGDocumentWrapper.cpp
index b7d086b243a8..b4c04e7ce506 100644
--- a/image/src/SVGDocumentWrapper.cpp
+++ b/image/src/SVGDocumentWrapper.cpp
@@ -218,19 +218,6 @@ SVGDocumentWrapper::SetCurrentTime(float aTime)
   }
 }
 
-void
-SVGDocumentWrapper::TickRefreshDriver()
-{
-  nsCOMPtr<nsIPresShell> presShell;
-  mViewer->GetPresShell(getter_AddRefs(presShell));
-  if (presShell) {
-    nsPresContext* presContext = presShell->GetPresContext();
-    if (presContext) {
-      presContext->RefreshDriver()->DoTick();
-    }
-  }
-}
-
 /** nsIStreamListener methods **/
 
 /* void onDataAvailable (in nsIRequest request, in nsISupports ctxt,
diff --git a/image/src/SVGDocumentWrapper.h b/image/src/SVGDocumentWrapper.h
index 4904592b0eed..425036b1ccaa 100644
--- a/image/src/SVGDocumentWrapper.h
+++ b/image/src/SVGDocumentWrapper.h
@@ -137,7 +137,6 @@ public:
   void ResetAnimation();
   float GetCurrentTime();
   void SetCurrentTime(float aTime);
-  void TickRefreshDriver();
 
   /**
    * Force a layout flush of the underlying SVG document.
diff --git a/image/src/VectorImage.cpp b/image/src/VectorImage.cpp
index 45cf49f310dd..d36252bdb39a 100644
--- a/image/src/VectorImage.cpp
+++ b/image/src/VectorImage.cpp
@@ -540,10 +540,9 @@ VectorImage::RequestRefresh(const TimeStamp& aTime)
     return;
   }
 
+  // TODO: Implement for b666446.
   EvaluateAnimation();
 
-  mSVGDocumentWrapper->TickRefreshDriver();
-
   if (mHasPendingInvalidation) {
     SendInvalidationNotifications();
     mHasPendingInvalidation = false;
diff --git a/layout/base/nsRefreshDriver.cpp b/layout/base/nsRefreshDriver.cpp
index 3bf8b02d718a..18ecc5085f80 100644
--- a/layout/base/nsRefreshDriver.cpp
+++ b/layout/base/nsRefreshDriver.cpp
@@ -856,13 +856,6 @@ nsRefreshDriver::EnsureTimerStarted(bool aAdjustingTimer)
     return;
   }
 
-  if (mPresContext->Document()->IsBeingUsedAsImage()) {
-    // Image documents receive ticks from clients' refresh drivers.
-    MOZ_ASSERT(!mActiveTimer,
-               "image document refresh driver should never have its own timer");
-    return;
-  }
-
   // We got here because we're either adjusting the time *or* we're
   // starting it for the first time.  Add to the right timer,
   // prehaps removing it from a previously-set one.