cc/blimp: Remove Initialize and Close messages.

blimp/client/core/compositor/blimp_compositor.h

Index: blimp/client/core/compositor/blimp_compositor.h
diff --git a/blimp/client/core/compositor/blimp_compositor.h b/blimp/client/core/compositor/blimp_compositor.h
index 095c9e1fbd6b6462410a22df9830284fbe6e2973..79da0b8035d162fe2ac808fe014fb557db6286f5 100644
--- a/blimp/client/core/compositor/blimp_compositor.h
+++ b/blimp/client/core/compositor/blimp_compositor.h
@@ -180,10 +180,6 @@ class BlimpCompositor : public cc::LayerTreeHostClient,
 
   std::unique_ptr<cc::LayerTreeHostInterface> host_;
 
-  // Whether or not |host_| should be visible.  This is stored in case |host_|
-  // is null when SetVisible() is called.
-  bool host_should_be_visible_;
-
   // The SurfaceFactory is bound to the lifetime of the BlimpOutputSurface. When
   // detached, the surface factory will be destroyed.
   std::unique_ptr<cc::SurfaceFactory> surface_factory_;