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..40273123d5f83e71f5c3fbc82585f74294751bcf 100644
--- a/ui/compositor/compositor.h
+++ b/ui/compositor/compositor.h
@@ -9,6 +9,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
+#include "cc/font_atlas.h"
 #include "cc/layer_tree_host_client.h"
 #include "ui/compositor/compositor_export.h"
 #include "ui/gfx/native_widget_types.h"
@@ -19,6 +20,7 @@
 class SkBitmap;
 
 namespace cc {
+class FontAtlas;
 class Layer;
 class LayerTreeHost;
 }
@@ -258,6 +260,7 @@ 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_; }