Bug 603071 - Part 1: Properly propagate LayerManager destruction through layer tree. r=roc a=blocking-beta8

gfx/layers/d3d10/LayerManagerD3D10.cpp

@@ -84,6 +84,7 @@ LayerManagerD3D10::LayerManagerD3D10(nsIWidget *aWidget)
 
 LayerManagerD3D10::~LayerManagerD3D10()
 {
+  Destroy();
 }
 
 bool
@@ -201,6 +202,17 @@ LayerManagerD3D10::Initialize()
   return true;
 }
 
+void
+LayerManagerD3D10::Destroy()
+{
+  if (!IsDestroyed()) {
+    if (mRoot) {
+      static_cast<LayerD3D10*>(mRoot->ImplData())->LayerManagerDestroyed();
+    }
+  }
+  LayerManager::Destroy();
+}
+
 void
 LayerManagerD3D10::SetRoot(Layer *aRoot)
 {

gfx/layers/d3d10/LayerManagerD3D10.h

@@ -91,6 +91,8 @@ public:
   /*
    * LayerManager implementation.
    */
+  virtual void Destroy();
+
   virtual void SetRoot(Layer *aLayer);
 
   void BeginTransaction();