Compositor leaks all resources if tab is closed and it's not the last in the process

Source/WebCore/platform/graphics/chromium/LayerRendererChromium.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 169 matching lines @@
 
     m_headsUpDisplay = CCHeadsUpDisplay::create(this);
 }
 
 LayerRendererChromium::~LayerRendererChromium()
 {
     m_headsUpDisplay.clear(); // Explicitly destroy the HUD before the TextureManager dies.
     cleanupSharedObjects();
 }
 
+void LayerRendererChromium::clearRenderSurfacesOnCCLayerImplRecursive(CCLayerImpl* layer)
+{
+    for (size_t i = 0; i < layer->children().size(); ++i)
+        clearRenderSurfacesOnCCLayerImplRecursive(layer->children()[i].get());
+    layer->clearRenderSurface();
+}
+
+void LayerRendererChromium::clearRootCCLayerImpl()
+{
+    if (m_rootCCLayerImpl)
+        clearRenderSurfacesOnCCLayerImplRecursive(m_rootCCLayerImpl.get());
+    m_computedRenderSurfaceLayerList.clear();
+    m_rootCCLayerImpl.clear();
+}
+
 GraphicsContext3D* LayerRendererChromium::context()
 {
     return m_context.get();
 }
 
 #if USE(SKIA)
 GrContext* LayerRendererChromium::skiaContext()
 {
     if (!m_skiaContext && m_contextSupportsTextureFormatBGRA && m_contextSupportsReadFormatBGRA) {
         m_context->makeContextCurrent();
@@ skipping 395 matching lines @@
     m_context->prepareTexture();
 
     m_headsUpDisplay->onPresent();
 }
 
 void LayerRendererChromium::setRootLayer(PassRefPtr<LayerChromium> layer)
 {
     m_rootLayer = layer;
     if (m_rootLayer)
         m_rootLayer->setLayerRenderer(this);
+    else
+        clearRootCCLayerImpl();
     m_rootLayerContentTiler->invalidateEntireLayer();
 }
 
 void LayerRendererChromium::setLayerRendererRecursive(LayerChromium* layer)
 {
     const Vector<RefPtr<LayerChromium> >& children = layer->children();
     for (size_t i = 0; i < children.size(); ++i)
         setLayerRendererRecursive(children[i].get());
 
     if (layer->maskLayer())
@@ skipping 691 matching lines @@
     return m_videoLayerYUVProgram.get();
 }
 
 
 void LayerRendererChromium::cleanupSharedObjects()
 {
     makeContextCurrent();
 
     m_sharedGeometry.clear();
     m_borderProgram.clear();
-    m_canvasLayerProgram.clear();
     m_headsUpDisplayProgram.clear();
-    m_videoLayerRGBAProgram.clear();
-    m_videoLayerYUVProgram.clear();
-    m_pluginLayerProgram.clear();
     m_renderSurfaceProgram.clear();
     m_renderSurfaceMaskProgram.clear();
     m_tilerProgram.clear();
     m_tilerProgramSwizzle.clear();
+    m_tilerProgramAA.clear();
+    m_tilerProgramSwizzleAA.clear();
+    m_canvasLayerProgram.clear();
+    m_videoLayerRGBAProgram.clear();
+    m_videoLayerYUVProgram.clear();
+    m_pluginLayerProgram.clear();
     if (m_offscreenFramebufferId)
         GLC(m_context.get(), m_context->deleteFramebuffer(m_offscreenFramebufferId));
 
     // Clear tilers before the texture manager, as they have references to textures.
     m_rootLayerContentTiler.clear();
 
     m_contentsTextureManager.clear();
     m_renderSurfaceTextureManager.clear();
 }
 
@@ skipping 122 matching lines @@
 PassOwnPtr<CCLayerTreeHostImplProxy> LayerRendererChromium::createLayerTreeHostImplProxy()
 {
     OwnPtr<CCLayerTreeHostImplProxy> proxy = LayerRendererChromiumImplProxy::create(this);
     proxy->start();
     return proxy.release();
 }
 
 } // namespace WebCore
 
 #endif // USE(ACCELERATED_COMPOSITING)