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

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

Index: Source/WebCore/platform/graphics/chromium/LayerRendererChromium.cpp
===================================================================
--- Source/WebCore/platform/graphics/chromium/LayerRendererChromium.cpp	(revision 93831)
+++ Source/WebCore/platform/graphics/chromium/LayerRendererChromium.cpp	(working copy)
@@ -187,6 +187,21 @@
     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();
@@ -602,6 +617,8 @@
     m_rootLayer = layer;
     if (m_rootLayer)
         m_rootLayer->setLayerRenderer(this);
+    else
+        clearRootCCLayerImpl();
     m_rootLayerContentTiler->invalidateEntireLayer();
 }
 
@@ -1313,15 +1330,17 @@
 
     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));