cc: Split out calcDrawEtc from drawLayers

cc/layer_impl.cc

Index: cc/layer_impl.cc
diff --git a/cc/layer_impl.cc b/cc/layer_impl.cc
index 34441b5d6ca263d8865db73e8cfad584a386da29..243a60d35b19443c481e660440db1d7d7fed0877 100644
--- a/cc/layer_impl.cc
+++ b/cc/layer_impl.cc
@@ -67,6 +67,8 @@ void LayerImpl::addChild(scoped_ptr<LayerImpl> child)
 {
     child->setParent(this);
     m_children.append(child.Pass());
+    if (m_layerTreeHostImpl)
+        m_layerTreeHostImpl->setNeedsUpdateLayers();
 }
 
 void LayerImpl::removeFromParent()
@@ -80,6 +82,8 @@ void LayerImpl::removeFromParent()
     for (size_t i = 0; i < parent->m_children.size(); ++i) {
         if (parent->m_children[i] == this) {
             parent->m_children.remove(i);
+            if (m_layerTreeHostImpl)
+                m_layerTreeHostImpl->setNeedsUpdateLayers();
             return;
         }
     }
@@ -94,6 +98,8 @@ void LayerImpl::removeAllChildren()
 void LayerImpl::clearChildList()
 {
     m_children.clear();
+    if (m_layerTreeHostImpl)
+        m_layerTreeHostImpl->setNeedsUpdateLayers();
 }
 
 void LayerImpl::createRenderSurface()
@@ -116,6 +122,17 @@ int LayerImpl::descendantsDrawContent()
     return result;
 }
 
+void LayerImpl::setLayerTreeHostImpl(LayerTreeHostImpl* hostImpl)
+{
+    if (m_layerTreeHostImpl == hostImpl)
+        return;
+
+    m_layerTreeHostImpl = hostImpl;
+
+    if (m_layerTreeHostImpl)
+        m_layerTreeHostImpl->setNeedsUpdateLayers();
+}
+
 scoped_ptr<SharedQuadState> LayerImpl::createSharedQuadState() const
 {
   scoped_ptr<SharedQuadState> state = SharedQuadState::Create();
@@ -375,16 +392,31 @@ bool LayerImpl::layerSurfacePropertyChanged() const
     return false;
 }
 
-void LayerImpl::noteLayerPropertyChangedForSubtree()
+void LayerImpl::noteLayerSurfacePropertyChanged()
+{
+    m_layerSurfacePropertyChanged = true;
+    if (m_layerTreeHostImpl)
+        m_layerTreeHostImpl->setNeedsUpdateLayers();
+}
+
+void LayerImpl::noteLayerPropertyChanged()
 {
     m_layerPropertyChanged = true;
+    if (m_layerTreeHostImpl)
+        m_layerTreeHostImpl->setNeedsUpdateLayers();
+}
+
+void LayerImpl::noteLayerPropertyChangedForSubtree()
+{
+    noteLayerPropertyChanged();
     noteLayerPropertyChangedForDescendants();
 }
 
 void LayerImpl::noteLayerPropertyChangedForDescendants()
 {
-    for (size_t i = 0; i < m_children.size(); ++i)
+    for (size_t i = 0; i < m_children.size(); ++i) {
         m_children[i]->noteLayerPropertyChangedForSubtree();
+    }
 }
 
 const char* LayerImpl::layerTypeAsString() const
@@ -452,7 +484,7 @@ void LayerImpl::setBounds(const gfx::Size& bounds)
     if (masksToBounds())
         noteLayerPropertyChangedForSubtree();
     else
-        m_layerPropertyChanged = true;
+        noteLayerPropertyChanged();
 }
 
 void LayerImpl::setMaskLayer(scoped_ptr<LayerImpl> maskLayer)
@@ -485,7 +517,7 @@ void LayerImpl::setDrawsContent(bool drawsContent)
         return;
 
     m_drawsContent = drawsContent;
-    m_layerPropertyChanged = true;
+    noteLayerPropertyChanged();
 }
 
 void LayerImpl::setAnchorPoint(const gfx::PointF& anchorPoint)
@@ -512,7 +544,7 @@ void LayerImpl::setBackgroundColor(SkColor backgroundColor)
         return;
 
     m_backgroundColor = backgroundColor;
-    m_layerPropertyChanged = true;
+    noteLayerPropertyChanged();
 }
 
 void LayerImpl::setFilters(const WebKit::WebFilterOperations& filters)
@@ -531,7 +563,7 @@ void LayerImpl::setBackgroundFilters(const WebKit::WebFilterOperations& backgrou
         return;
 
     m_backgroundFilters = backgroundFilters;
-    m_layerPropertyChanged = true;
+    noteLayerPropertyChanged();
 }
 
 void LayerImpl::setFilter(const skia::RefPtr<SkImageFilter>& filter)
@@ -568,7 +600,7 @@ void LayerImpl::setOpacity(float opacity)
         return;
 
     m_opacity = opacity;
-    m_layerSurfacePropertyChanged = true;
+    noteLayerSurfacePropertyChanged();
 }
 
 bool LayerImpl::opacityIsAnimating() const
@@ -610,7 +642,7 @@ void LayerImpl::setTransform(const gfx::Transform& transform)
         return;
 
     m_transform = transform;
-    m_layerSurfacePropertyChanged = true;
+    noteLayerSurfacePropertyChanged();
 }
 
 bool LayerImpl::transformIsAnimating() const
@@ -624,7 +656,7 @@ void LayerImpl::setContentBounds(const gfx::Size& contentBounds)
         return;
 
     m_contentBounds = contentBounds;
-    m_layerPropertyChanged = true;
+    noteLayerPropertyChanged();
 }
 
 void LayerImpl::setContentsScale(float contentsScaleX, float contentsScaleY)
@@ -634,7 +666,7 @@ void LayerImpl::setContentsScale(float contentsScaleX, float contentsScaleY)
 
     m_contentsScaleX = contentsScaleX;
     m_contentsScaleY = contentsScaleY;
-    m_layerPropertyChanged = true;
+    noteLayerPropertyChanged();
 }
 
 void LayerImpl::setScrollOffset(gfx::Vector2d scrollOffset)