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

cc/resources/tile_priority.h

 // Copyright 2012 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_TILE_PRIORITY_H_
 #define CC_RESOURCES_TILE_PRIORITY_H_
 
 #include <algorithm>
 #include <limits>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/resources/picture_pile.h"
 #include "ui/gfx/quad_f.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/size.h"
 
 namespace base {
 class Value;
 }
 
 namespace cc {
 
 enum WhichTree {
   // Note: these must be 0 and 1 because we index with them in various places,
   // e.g. in Tile::priority_.
   ACTIVE_TREE = 0,
   PENDING_TREE = 1,
-  NUM_TREES = 2
+  MAX_TREE = PENDING_TREE
   // Be sure to update WhichTreeAsValue when adding new fields.
 };
 scoped_ptr<base::Value> WhichTreeAsValue(
     WhichTree tree);
 
 enum TileResolution {
   LOW_RESOLUTION = 0 ,
   HIGH_RESOLUTION = 1,
   NON_IDEAL_RESOLUTION = 2,
 };
@@ skipping 90 matching lines @@
 
   // You might be made visible, but you're not being interacted with.
   ALLOW_ABSOLUTE_MINIMUM = 1,  // Tall.
 
   // You're being interacted with, but we're low on memory.
   ALLOW_PREPAINT_ONLY = 2,  // Grande.
 
   // You're the only thing in town. Go crazy.
   ALLOW_ANYTHING = 3,  // Venti.
 
-  NUM_TILE_MEMORY_LIMIT_POLICIES = 4,
+  MAX_TILE_MEMORY_LIMIT_POLICY = ALLOW_ANYTHING,
 
   // NOTE: Be sure to update TreePriorityAsValue and kBinPolicyMap when adding
   // or reordering fields.
 };
 scoped_ptr<base::Value> TileMemoryLimitPolicyAsValue(
     TileMemoryLimitPolicy policy);
 
 enum TreePriority {
   SAME_PRIORITY_FOR_BOTH_TREES,
   SMOOTHNESS_TAKES_PRIORITY,
@@ skipping 19 matching lines @@
   size_t num_resources_limit;
 
   TreePriority tree_priority;
 
   scoped_ptr<base::Value> AsValue() const;
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_TILE_PRIORITY_H_