cc: Remove unnecessary "default" cases from switch statements.

cc/resources/managed_tile_state.h

 // Copyright 2013 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_RESOURCES_MANAGED_TILE_STATE_H_
 #define CC_RESOURCES_MANAGED_TILE_STATE_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/resources/platform_color.h"
 #include "cc/resources/raster_worker_pool.h"
@@ skipping 30 matching lines @@
 
 // This is state that is specific to a tile that is
 // managed by the TileManager.
 class CC_EXPORT ManagedTileState {
  public:
   class CC_EXPORT TileVersion {
     public:
       enum Mode {
         RESOURCE_MODE,
         SOLID_COLOR_MODE,
-        PICTURE_PILE_MODE,
-        NUM_MODES
+        PICTURE_PILE_MODE
       };
 
       TileVersion();
       ~TileVersion();
 
       Mode mode() const {
         return mode_;
       }
 
       bool IsReadyToDraw() const;
@@ skipping 90 matching lines @@
   float distance_to_visible_in_pixels;
   bool visible_and_ready_to_draw;
 
   // Priority for this state from the last time we assigned memory.
   unsigned scheduled_priority;
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_MANAGED_TILE_STATE_H_