cc: Create a cc::ScrollbarThemePainter and an adapter class in compositor bindings.

cc/caching_bitmap_content_layer_updater.cc

Index: cc/caching_bitmap_content_layer_updater.cc
diff --git a/cc/caching_bitmap_content_layer_updater.cc b/cc/caching_bitmap_content_layer_updater.cc
index ddeef24d4d2123c8f589bbe065d093861d971818..937b57d72786dcbc9238a86ca52e1f5f32db8aba 100644
--- a/cc/caching_bitmap_content_layer_updater.cc
+++ b/cc/caching_bitmap_content_layer_updater.cc
@@ -34,12 +34,13 @@ void CachingBitmapContentLayerUpdater::prepareToUpdate(
     float contents_height_scale,
     gfx::Rect& resulting_opaque_rect,
     RenderingStats& stats) {
-  BitmapContentLayerUpdater::prepareToUpdate(content_rect,
-                                                   tile_size,
-                                                   contents_width_scale,
-                                                   contents_height_scale,
-                                                   resulting_opaque_rect,
-                                                   stats);
+  BitmapContentLayerUpdater::prepareToUpdate(
+      content_rect,
+      tile_size,
+      contents_width_scale,
+      contents_height_scale,
+      resulting_opaque_rect,
+      stats);
 
   const SkBitmap& new_bitmap = m_canvas->getDevice()->accessBitmap(false);
   SkAutoLockPixels lock(new_bitmap);