Move CC switches to cc/switches.h.

cc/layer_tree_host.cc

Index: cc/layer_tree_host.cc
diff --git a/cc/layer_tree_host.cc b/cc/layer_tree_host.cc
index a571506afd5ed33242544ba619e3a3422d4e20fb..236a5884167308c9ccd4639c2fdb968949bbe2f5 100644
--- a/cc/layer_tree_host.cc
+++ b/cc/layer_tree_host.cc
@@ -546,7 +546,7 @@ void CCLayerTreeHost::updateLayers(LayerChromium* rootLayer, CCTextureUpdateQueu
     LayerList updateList;
 
     {
-        if (CCSettings::pageScalePinchZoomEnabled()) {
+        if (Settings::pageScalePinchZoomEnabled()) {
             LayerChromium* rootScroll = findFirstScrollableLayer(rootLayer);
             if (rootScroll)
                 rootScroll->setImplTransform(m_implTransform);
@@ -777,7 +777,7 @@ void CCLayerTreeHost::setDeviceScaleFactor(float deviceScaleFactor)
 
 void CCLayerTreeHost::animateLayers(double monotonicTime)
 {
-    if (!CCSettings::acceleratedAnimationEnabled() || !m_needsAnimateLayers)
+    if (!Settings::acceleratedAnimationEnabled() || !m_needsAnimateLayers)
         return;
 
     TRACE_EVENT0("cc", "CCLayerTreeHostImpl::animateLayers");