diff --git a/layout/base/nsIPresShell.h b/layout/base/nsIPresShell.h
index f0b3fab94383..d33061ee79e6 100644
--- a/layout/base/nsIPresShell.h
+++ b/layout/base/nsIPresShell.h
@@ -141,8 +141,8 @@ typedef struct CapturingContentInfo {
 } CapturingContentInfo;
 
 #define NS_IPRESSHELL_IID    \
-{ 0x4e23d557, 0x741a, 0x4fd0,\
-  { 0x91, 0x52, 0x34, 0xe2, 0xb4, 0xef, 0xe8, 0x2e } }
+{ 0x3ab5b116, 0x2d73, 0x431c, \
+ { 0x9a, 0x4b, 0x6c, 0x91, 0x9e, 0x42, 0x45, 0xc3 } }
 
 // Constants for ScrollContentIntoView() function
 #define NS_PRESSHELL_SCROLL_TOP      0
@@ -1148,6 +1148,7 @@ public:
   virtual bool ShouldIgnoreInvalidation() = 0;
   virtual void WillPaint(bool aWillSendDidPaint) = 0;
   virtual void DidPaint() = 0;
+  virtual void ScheduleViewManagerFlush() = 0;
   virtual void ClearMouseCaptureOnView(nsIView* aView) = 0;
   virtual bool IsVisible() = 0;
   virtual void DispatchSynthMouseMove(nsGUIEvent *aEvent, bool aFlushOnHoverChange) = 0;
diff --git a/layout/base/nsPresShell.cpp b/layout/base/nsPresShell.cpp
index 29e8838fd8ff..d041beca6676 100644
--- a/layout/base/nsPresShell.cpp
+++ b/layout/base/nsPresShell.cpp
@@ -1253,6 +1253,8 @@ PresShell::Destroy()
   // before we destroy the frame manager, since apparently frame destruction
   // sometimes spins the event queue when plug-ins are involved(!).
   rd->RemoveLayoutFlushObserver(this);
+  rd->RevokeViewManagerFlush();
+
   mResizeEvent.Revoke();
   if (mAsyncResizeTimerIsActive) {
     mAsyncResizeEventTimer->Cancel();
@@ -3612,6 +3614,15 @@ nsresult PresShell::GetLinkLocation(nsIDOMNode* aNode, nsAString& aLocationStrin
   return NS_ERROR_FAILURE;
 }
 
+void
+PresShell::ScheduleViewManagerFlush()
+{
+  nsPresContext* presContext = GetPresContext();
+  if (presContext) {
+    presContext->RefreshDriver()->ScheduleViewManagerFlush();
+  }
+}
+
 void
 PresShell::DispatchSynthMouseMove(nsGUIEvent *aEvent,
                                   bool aFlushOnHoverChange)
diff --git a/layout/base/nsPresShell.h b/layout/base/nsPresShell.h
index 21eb16a9f1c4..0f1e05be004a 100644
--- a/layout/base/nsPresShell.h
+++ b/layout/base/nsPresShell.h
@@ -330,6 +330,7 @@ public:
   virtual bool ShouldIgnoreInvalidation();
   virtual void WillPaint(bool aWillSendDidPaint);
   virtual void DidPaint();
+  virtual void ScheduleViewManagerFlush();
   virtual void DispatchSynthMouseMove(nsGUIEvent *aEvent, bool aFlushOnHoverChange);
   virtual void ClearMouseCaptureOnView(nsIView* aView);
   virtual bool IsVisible();
diff --git a/layout/base/nsRefreshDriver.cpp b/layout/base/nsRefreshDriver.cpp
index acda81fda551..258f7b79faff 100644
--- a/layout/base/nsRefreshDriver.cpp
+++ b/layout/base/nsRefreshDriver.cpp
@@ -55,6 +55,7 @@
 #include "jsapi.h"
 #include "nsContentUtils.h"
 #include "mozilla/Preferences.h"
+#include "nsIViewManager.h"
 
 using mozilla::TimeStamp;
 using mozilla::TimeDuration;
@@ -112,6 +113,7 @@ nsRefreshDriver::nsRefreshDriver(nsPresContext *aPresContext)
     mThrottled(false),
     mTestControllingRefreshes(false),
     mTimerIsPrecise(false),
+    mViewManagerFlushIsPending(false),
     mLastTimerInterval(0)
 {
   mRequests.Init();
@@ -270,6 +272,7 @@ nsRefreshDriver::ObserverCount() const
   sum += mStyleFlushObservers.Length();
   sum += mLayoutFlushObservers.Length();
   sum += mFrameRequestCallbackDocs.Length();
+  sum += mViewManagerFlushIsPending;
   return sum;
 }
 
@@ -431,6 +434,11 @@ nsRefreshDriver::Notify(nsITimer *aTimer)
     EnsureTimerStarted(false);
   }
 
+  if (mViewManagerFlushIsPending) {
+    mViewManagerFlushIsPending = false;
+    mPresContext->GetPresShell()->GetViewManager()->ProcessPendingUpdates();
+  }
+
   if (mThrottled ||
       (mTimerIsPrecise !=
        (GetRefreshTimerType() == nsITimer::TYPE_REPEATING_PRECISE_CAN_SKIP))) {
diff --git a/layout/base/nsRefreshDriver.h b/layout/base/nsRefreshDriver.h
index 8c0b01dec5db..1deb044969d5 100644
--- a/layout/base/nsRefreshDriver.h
+++ b/layout/base/nsRefreshDriver.h
@@ -176,6 +176,17 @@ public:
     return mLayoutFlushObservers.Contains(aShell);
   }
 
+  /**
+   * Remember whether our presshell's view manager needs a flush
+   */
+  void ScheduleViewManagerFlush() {
+    mViewManagerFlushIsPending = true;
+    EnsureTimerStarted(false);
+  }
+  void RevokeViewManagerFlush() {
+    mViewManagerFlushIsPending = false;
+  }
+
   /**
    * Add a document for which we have nsIFrameRequestCallbacks
    */
@@ -265,6 +276,7 @@ private:
      a precise timer.  If mTimer is null, this boolean's value can be
      anything.  */
   bool mTimerIsPrecise;
+  bool mViewManagerFlushIsPending;
 
   // separate arrays for each flush type we support
   ObserverArray mObservers[3];
diff --git a/view/public/nsIViewManager.h b/view/public/nsIViewManager.h
index 98101ef8754d..ac2f114fb1aa 100644
--- a/view/public/nsIViewManager.h
+++ b/view/public/nsIViewManager.h
@@ -348,6 +348,12 @@ public:
    * the nearest enclosing popup or the root view for the root document.
    */
   static nsIView* GetDisplayRootFor(nsIView* aView);
+
+  /**
+   * Flush the accumulated dirty region to the widget and update widget
+   * geometry.
+   */
+  virtual void ProcessPendingUpdates()=0;
 };
 
 NS_DEFINE_STATIC_IID_ACCESSOR(nsIViewManager, NS_IVIEWMANAGER_IID)
diff --git a/view/src/nsViewManager.cpp b/view/src/nsViewManager.cpp
index 2a23e0c625e0..6f19d187a851 100644
--- a/view/src/nsViewManager.cpp
+++ b/view/src/nsViewManager.cpp
@@ -398,7 +398,8 @@ void nsViewManager::RenderViews(nsView *aView, nsIWidget *aWidget,
   }
 }
 
-void nsViewManager::ProcessPendingUpdates(nsView* aView, bool aDoInvalidate)
+void nsViewManager::ProcessPendingUpdatesForView(nsView* aView,
+                                                 bool aDoInvalidate)
 {
   NS_ASSERTION(IsRootVM(), "Updates will be missed");
 
@@ -414,7 +415,7 @@ void nsViewManager::ProcessPendingUpdates(nsView* aView, bool aDoInvalidate)
   // process pending updates in child view.
   for (nsView* childView = aView->GetFirstChild(); childView;
        childView = childView->GetNextSibling()) {
-    ProcessPendingUpdates(childView, aDoInvalidate);
+    ProcessPendingUpdatesForView(childView, aDoInvalidate);
   }
 
   if (aDoInvalidate) {
@@ -828,7 +829,7 @@ NS_IMETHODIMP nsViewManager::DispatchEvent(nsGUIEvent *aEvent,
             // Make sure to sync up any widget geometry changes we
             // have pending before we paint.
             if (rootVM->mHasPendingUpdates) {
-              rootVM->ProcessPendingUpdates(mRootView, false);
+              rootVM->ProcessPendingUpdatesForView(mRootView, false);
             }
             
             if (view && aEvent->message == NS_PAINT) {
@@ -1424,6 +1425,12 @@ nsViewManager::IsPainting(bool& aIsPainting)
   return NS_OK;
 }
 
+void
+nsViewManager::ProcessPendingUpdates()
+{
+  // To be implemented.
+}
+
 void
 nsViewManager::FlushPendingInvalidates()
 {
@@ -1431,7 +1438,7 @@ nsViewManager::FlushPendingInvalidates()
   NS_ASSERTION(mUpdateBatchCnt == 0, "Must not be in an update batch!");
 
   if (mHasPendingUpdates) {
-    ProcessPendingUpdates(mRootView, true);
+    ProcessPendingUpdatesForView(mRootView, true);
     mHasPendingUpdates = false;
   }
 }
diff --git a/view/src/nsViewManager.h b/view/src/nsViewManager.h
index 90afdf83f3ac..b5f1ce68cd6e 100644
--- a/view/src/nsViewManager.h
+++ b/view/src/nsViewManager.h
@@ -144,13 +144,15 @@ public:
   /* Update the cached RootViewManager pointer on this view manager. */
   void InvalidateHierarchy();
 
+  virtual void ProcessPendingUpdates();
+
 protected:
   virtual ~nsViewManager();
 
 private:
 
   void FlushPendingInvalidates();
-  void ProcessPendingUpdates(nsView *aView, bool aDoInvalidate);
+  void ProcessPendingUpdatesForView(nsView *aView, bool aDoInvalidate);
   void FlushDirtyRegionToWidget(nsView* aView);
   /**
    * Call WillPaint() on all view observers under this vm root.