cc: switch to new WebLayerTreeViewClient API for requesting font atlas

ui/compositor/compositor.cc

Index: ui/compositor/compositor.cc
diff --git a/ui/compositor/compositor.cc b/ui/compositor/compositor.cc
index a36e96b916f4fc372d886e2ad0e75d9089dd7ae6..14f6a1b1a18ddc237d37cca906bf6da8d9ad04e7 100644
--- a/ui/compositor/compositor.cc
+++ b/ui/compositor/compositor.cc
@@ -12,6 +12,7 @@
 #include "base/message_loop.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
+#include "cc/font_atlas.h"
 #include "cc/input_handler.h"
 #include "cc/layer.h"
 #include "cc/layer_tree_host.h"
@@ -543,6 +544,10 @@ void Compositor::scheduleComposite() {
     ScheduleDraw();
 }
 
+scoped_ptr<cc::FontAtlas> Compositor::createFontAtlas() {
+  return scoped_ptr<cc::FontAtlas>();
+}
+
 scoped_refptr<CompositorLock> Compositor::GetCompositorLock() {
   if (!compositor_lock_) {
     compositor_lock_ = new CompositorLock(this);