cc: Add more DrawSwapReadbackResult enums

cc/scheduler/draw_swap_readback_result.h

 // Copyright 2014 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_SCHEDULER_DRAW_SWAP_READBACK_RESULT_H_
 #define CC_SCHEDULER_DRAW_SWAP_READBACK_RESULT_H_
 
 namespace cc {
 
 struct DrawSwapReadbackResult {
   enum DrawResult {
     INVALID_RESULT,
     DRAW_SUCCESS,
     DRAW_ABORTED_CHECKERBOARD_ANIMATIONS,
     DRAW_ABORTED_MISSING_HIGH_RES_CONTENT,
+    DRAW_ABORTED_CANT_READBACK,
+    DRAW_ABORTED_CONTEXT_LOST,
+    DRAW_ABORTED_CANT_DRAW,
   };
 
   DrawSwapReadbackResult()
       : draw_result(INVALID_RESULT), did_swap(false), did_readback(false) {}
   DrawSwapReadbackResult(DrawResult draw_result,
                          bool did_swap,
                          bool did_readback)
       : draw_result(draw_result),
         did_swap(did_swap),
         did_readback(did_readback) {}
   DrawResult draw_result;
   bool did_swap;
   bool did_readback;
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_DRAW_SWAP_READBACK_RESULT_H_