cc: Renamed approximate{BytesUsed,OpCount} in paint op buffer.

cc/paint/compositing_display_item.h

 // Copyright 2015 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_PAINT_COMPOSITING_DISPLAY_ITEM_H_
 #define CC_PAINT_COMPOSITING_DISPLAY_ITEM_H_
 
 #include <stddef.h>
 
 #include "cc/paint/display_item.h"
@@ skipping 11 matching lines @@
                          SkBlendMode xfermode,
                          SkRect* bounds,
                          sk_sp<SkColorFilter> color_filter,
                          bool lcd_text_requires_opaque_layer);
   ~CompositingDisplayItem() override;
 
   size_t ExternalMemoryUsage() const {
     // TODO(pdr): Include color_filter's memory here.
     return 0;
   }
-  int ApproximateOpCount() const { return 1; }
+  int OpCount() const { return 1; }
 
   const uint8_t alpha;
   const SkBlendMode xfermode;
   const bool has_bounds;
   const SkRect bounds;
   const sk_sp<SkColorFilter> color_filter;
   const bool lcd_text_requires_opaque_layer;
 };
 
 class CC_PAINT_EXPORT EndCompositingDisplayItem : public DisplayItem {
  public:
   EndCompositingDisplayItem();
   ~EndCompositingDisplayItem() override;
 
-  int ApproximateOpCount() const { return 0; }
+  int OpCount() const { return 0; }
 };
 
 }  // namespace cc
 
 #endif  // CC_PAINT_COMPOSITING_DISPLAY_ITEM_H_