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

cc/trees/layer_tree_host.cc

 // 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.
 
 #include "cc/trees/layer_tree_host.h"
 
 #include <algorithm>
 #include <stack>
 
 #include "base/bind.h"
@@ skipping 527 matching lines @@
           break;
 
         case AnimationEvent::Finished:
           (*iter).second->NotifyAnimationFinished((*events)[event_index],
                                                   wall_clock_time.ToDoubleT());
           break;
 
         case AnimationEvent::PropertyUpdate:
           (*iter).second->NotifyAnimationPropertyUpdate((*events)[event_index]);
           break;
-
-        default:
-          NOTREACHED();
       }
     }
   }
 }
 
 void LayerTreeHost::SetRootLayer(scoped_refptr<Layer> root_layer) {
   if (root_layer_.get() == root_layer.get())
     return;
 
   if (root_layer_.get())
@@ skipping 611 matching lines @@
 void LayerTreeHost::DidLoseUIResources() {
   // When output surface is lost, we need to recreate the resource.
   for (UIResourceClientMap::iterator iter = ui_resource_client_map_.begin();
        iter != ui_resource_client_map_.end();
        ++iter) {
     UIResourceLost(iter->first);
   }
 }
 
 }  // namespace cc