cc: Add DEFINE_ENUM macro.

cc/resources/raster_worker_pool.cc

 // 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.
 
 #include "cc/resources/raster_worker_pool.h"
 
 #include "base/json/json_writer.h"
 #include "base/metrics/histogram.h"
 #include "base/values.h"
 #include "cc/debug/benchmark_instrumentation.h"
@@ skipping 104 matching lines @@
     skia::RefPtr<SkDrawFilter> draw_filter;
     switch (raster_mode_) {
       case LOW_QUALITY_RASTER_MODE:
         draw_filter = skia::AdoptRef(new skia::PaintSimplifier);
         break;
       case HIGH_QUALITY_NO_LCD_RASTER_MODE:
         draw_filter = skia::AdoptRef(new DisableLCDTextFilter);
         break;
       case HIGH_QUALITY_RASTER_MODE:
         break;
-      case NUM_RASTER_MODES:
-      default:
-        NOTREACHED();
     }
 
     canvas.setDrawFilter(draw_filter.get());
 
     if (rendering_stats_->record_rendering_stats()) {
       PicturePileImpl::RasterStats raster_stats;
       picture_clone->RasterToBitmap(
           &canvas, content_rect_, contents_scale_, &raster_stats);
       rendering_stats_->AddRaster(
           raster_stats.total_rasterize_time,
@@ skipping 396 matching lines @@
 
     internal::GraphNode* decode_node = CreateGraphNodeForTask(
         decode_task, priority, graph);
     decode_node->add_dependent(raster_node);
   }
 
   return raster_node;
 }
 
 }  // namespace cc