cc: Remove vectors from tiling eviction tile iterator.

cc/resources/picture_layer_tiling_set.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_PICTURE_LAYER_TILING_SET_H_
 #define CC_RESOURCES_PICTURE_LAYER_TILING_SET_H_
 
 #include "cc/base/region.h"
 #include "cc/base/scoped_ptr_vector.h"
 #include "cc/resources/picture_layer_tiling.h"
 #include "ui/gfx/size.h"
 
 namespace cc {
 
 class CC_EXPORT PictureLayerTilingSet {
  public:
   enum TilingRangeType {
     HIGHER_THAN_HIGH_RES,
     HIGH_RES,
     BETWEEN_HIGH_AND_LOW_RES,
     LOW_RES,
     LOWER_THAN_LOW_RES
   };
   struct TilingRange {
     TilingRange(size_t start, size_t end) : start(start), end(end) {}
 
+    bool IsIndexWithinRange(size_t index) const {
+      return index >= start && index < end;
+    }

[reveman, 2014/08/01 17:54:47]

I don't think we need this. I can't see a reason why you would have to check
that "index >= start".

[vmpstr, 2014/08/01 19:39:50]

We iterate two of the ranges in reverse order, so we need to know both if we end
up below start and if we end up at or above end

+
     size_t start;
     size_t end;
   };
 
   PictureLayerTilingSet(PictureLayerTilingClient* client,
                         const gfx::Size& layer_bounds);
   ~PictureLayerTilingSet();
 
   void SetClient(PictureLayerTilingClient* client);
   const PictureLayerTilingClient* client() const { return client_; }
@@ skipping 88 matching lines @@
   gfx::Size layer_bounds_;
   ScopedPtrVector<PictureLayerTiling> tilings_;
 
   friend class Iterator;
   DISALLOW_COPY_AND_ASSIGN(PictureLayerTilingSet);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_PICTURE_LAYER_TILING_SET_H_