cc: switch to new WebLayerTreeViewClient API for requesting font atlas

ui/compositor/compositor.h

Index: ui/compositor/compositor.h
diff --git a/ui/compositor/compositor.h b/ui/compositor/compositor.h
index 5029b5038ab7235fc379a9ae5aafc157ba5130de..0e2445f7cc3ac477c4bfa31bcb8980d8d1ac9f83 100644
--- a/ui/compositor/compositor.h
+++ b/ui/compositor/compositor.h
@@ -19,6 +19,7 @@
 class SkBitmap;
 
 namespace cc {
+class FontAtlas;
 class Layer;
 class LayerTreeHost;
 }
@@ -258,6 +259,7 @@ class COMPOSITOR_EXPORT Compositor
   virtual void didCommitAndDrawFrame() OVERRIDE;
   virtual void didCompleteSwapBuffers() OVERRIDE;
   virtual void scheduleComposite() OVERRIDE;
+  virtual scoped_ptr<cc::FontAtlas> createFontAtlas() OVERRIDE;
 
 
   int last_started_frame() { return last_started_frame_; }