cc: Remove cc::settings, move them to LayerTreeSettings.

cc/content_layer.cc

Index: cc/content_layer.cc
diff --git a/cc/content_layer.cc b/cc/content_layer.cc
index 5f4689674fa18529adcc292f70b5a8a7e7c89b6c..b34ce107e0ced197af3d767f4dc3b8c67f74016f 100644
--- a/cc/content_layer.cc
+++ b/cc/content_layer.cc
@@ -11,7 +11,6 @@
 #include "cc/content_layer_client.h"
 #include "cc/layer_painter.h"
 #include "cc/layer_tree_host.h"
-#include "cc/settings.h"
 
 namespace cc {
 
@@ -87,7 +86,7 @@ void ContentLayer::createUpdaterIfNeeded()
     scoped_ptr<LayerPainter> painter = ContentLayerPainter::create(m_client).PassAs<LayerPainter>();
     if (layerTreeHost()->settings().acceleratePainting)
         m_updater = SkPictureContentLayerUpdater::create(painter.Pass());
-    else if (Settings::perTilePaintingEnabled())
+    else if (layerTreeHost()->settings().perTilePaintingEnabled)
         m_updater = BitmapSkPictureContentLayerUpdater::create(painter.Pass());
     else
         m_updater = BitmapContentLayerUpdater::create(painter.Pass());