Fix CC*Renderer and CC*LayerImpl to compile with Clang

cc/CCLayerSorter.cpp

Index: cc/CCLayerSorter.cpp
diff --git a/cc/CCLayerSorter.cpp b/cc/CCLayerSorter.cpp
index 1b643f5f11c34423c746f049652ff77f06e8d6e0..cf8577797211258877e2df9c020e41952027e814 100644
--- a/cc/CCLayerSorter.cpp
+++ b/cc/CCLayerSorter.cpp
@@ -62,6 +62,25 @@ static bool edgeEdgeTest(const FloatPoint& a, const FloatPoint& b, const FloatPo
     return true;
 }
 
+CCLayerSorter::GraphNode::GraphNode(CCLayerImpl* cclayer)
+    : layer(cclayer)
+    , incomingEdgeWeight(0)
+{
+}
+
+CCLayerSorter::GraphNode::~GraphNode()
+{
+}
+
+CCLayerSorter::CCLayerSorter()
+    : m_zRange(0)
+{
+}
+
+CCLayerSorter::~CCLayerSorter()
+{
+}
+
 // Checks whether layer "a" draws on top of layer "b". The weight value returned is an indication of
 // the maximum z-depth difference between the layers or zero if the layers are found to be intesecting
 // (some features are in front and some are behind).
@@ -132,6 +151,10 @@ CCLayerSorter::ABCompareResult CCLayerSorter::checkOverlap(LayerShape* a, LayerS
     return BBeforeA;
 }
 
+CCLayerSorter::LayerShape::LayerShape()
+{
+}
+
 CCLayerSorter::LayerShape::LayerShape(float width, float height, const WebTransformationMatrix& drawTransform)
 {
     FloatQuad layerQuad(FloatRect(0, 0, width, height));