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

cc/CCLayerSorter.cpp

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 
 #include "CCLayerSorter.h"
 
 #include "CCMathUtil.h"
 #include "CCRenderSurface.h"
@@ skipping 44 matching lines @@
 
     float t = perpProduct(u, w) / denom;
     if (t < 0 || t > 1)
         return false;
 
     u.scale(s);
     r = a + u;
     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).
 CCLayerSorter::ABCompareResult CCLayerSorter::checkOverlap(LayerShape* a, LayerShape* b, float zThreshold, float& weight)
 {
     weight = 0;
 
     // Early out if the projected bounds don't overlap.
     if (!a->projectedBounds.intersects(b->projectedBounds))
         return None;
@@ skipping 50 matching lines @@
     else
         weight = fabsf(maxDiff);
 
     // Maintain relative order if the layers have the same depth at all intersection points.
     if (maxDiff <= 0)
         return ABeforeB;
 
     return BBeforeA;
 }
 
+CCLayerSorter::LayerShape::LayerShape()
+{
+}
+
 CCLayerSorter::LayerShape::LayerShape(float width, float height, const WebTransformationMatrix& drawTransform)
 {
     FloatQuad layerQuad(FloatRect(0, 0, width, height));
 
     // Compute the projection of the layer quad onto the z = 0 plane.
 
     FloatPoint clippedQuad[8];
     int numVerticesInClippedQuad;
     CCMathUtil::mapClippedQuad(drawTransform, layerQuad, clippedQuad, numVerticesInClippedQuad);
 
@@ skipping 268 matching lines @@
 #if !defined( NDEBUG )
     LOG(CCLayerSorter, "Sorting end ----\n");
 #endif
 
     m_nodes.clear();
     m_edges.clear();
     m_activeEdges.clear();
 }
 
 }