cc: Get rid of LayerTreeHost::output_surface_lost_ state.

cc/trees/single_thread_proxy.h

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_TREES_SINGLE_THREAD_PROXY_H_
 #define CC_TREES_SINGLE_THREAD_PROXY_H_
 
 #include <limits>
 
 #include "base/cancelable_callback.h"
@@ skipping 139 matching lines @@
 #endif
   bool inside_draw_;
   bool defer_commits_;
   bool animate_requested_;
   bool commit_requested_;
   bool inside_synchronous_composite_;
 
   // True if a request to the LayerTreeHostClient to create an output surface
   // is still outstanding.
   bool output_surface_creation_requested_;
+  // When output surface is lost, is set to true until a new output surface is
+  // initialized.
+  bool output_surface_lost_;
 
   // This is the callback for the scheduled RequestNewOutputSurface.
   base::CancelableClosure output_surface_creation_callback_;
 
   base::WeakPtrFactory<SingleThreadProxy> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SingleThreadProxy);
 };
 
 // For use in the single-threaded case. In debug builds, it pretends that the
@@ skipping 67 matching lines @@
  private:
   DebugScopedSetImplThread impl_thread_;
   DebugScopedSetMainThreadBlocked main_thread_blocked_;
 
   DISALLOW_COPY_AND_ASSIGN(DebugScopedSetImplThreadAndMainThreadBlocked);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_SINGLE_THREAD_PROXY_H_