Handle ui::Layer's visibility using cc::Layer's m_isDrawable flag

cc/layer_impl.cc

Index: cc/layer_impl.cc
diff --git a/cc/layer_impl.cc b/cc/layer_impl.cc
index 2788c725035c733b07e858c8163f4cf763257b2f..89e86027086c9082ccc1f8f8cf16b57e4ec04b21 100644
--- a/cc/layer_impl.cc
+++ b/cc/layer_impl.cc
@@ -48,6 +48,7 @@ LayerImpl::LayerImpl(LayerTreeImpl* treeImpl, int id)
     , m_drawCheckerboardForMissingTiles(false)
     , m_drawsContent(false)
     , m_forceRenderSurface(false)
+    , m_visible(true)
     , m_isContainerForFixedPositionLayers(false)
     , m_fixedToContainerLayer(false)
     , m_drawDepth(0)
@@ -329,6 +330,7 @@ void LayerImpl::pushPropertiesTo(LayerImpl* layer)
     layer->setDrawCheckerboardForMissingTiles(m_drawCheckerboardForMissingTiles);
     layer->setForceRenderSurface(m_forceRenderSurface);
     layer->setDrawsContent(drawsContent());
+    layer->setVisible(visible());
     layer->setFilters(filters());
     layer->setFilter(filter());
     layer->setBackgroundFilters(backgroundFilters());
@@ -644,6 +646,15 @@ void LayerImpl::setDrawsContent(bool drawsContent)
     noteLayerPropertyChanged();
 }
 
+void LayerImpl::setVisible(bool visible)
+{
+    if (m_visible == visible)
+        return;
+
+    m_visible = visible;
+    noteLayerSurfacePropertyChanged();
+}
+
 void LayerImpl::setAnchorPoint(const gfx::PointF& anchorPoint)
 {
     if (m_anchorPoint == anchorPoint)