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

cc/paint/float_clip_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_FLOAT_CLIP_DISPLAY_ITEM_H_
 #define CC_PAINT_FLOAT_CLIP_DISPLAY_ITEM_H_
 
 #include <stddef.h>
 
 #include "cc/paint/display_item.h"
 #include "cc/paint/paint_export.h"
 #include "ui/gfx/geometry/rect_f.h"
 
 namespace cc {
 
 class CC_PAINT_EXPORT FloatClipDisplayItem : public DisplayItem {
  public:
   explicit FloatClipDisplayItem(const gfx::RectF& clip_rect);
   ~FloatClipDisplayItem() override;
 
   size_t ExternalMemoryUsage() const { return 0; }
-  int ApproximateOpCount() const { return 1; }
+  int OpCount() const { return 1; }
 
   const gfx::RectF clip_rect;
 };
 
 class CC_PAINT_EXPORT EndFloatClipDisplayItem : public DisplayItem {
  public:
   EndFloatClipDisplayItem();
   ~EndFloatClipDisplayItem() override;
 
-  int ApproximateOpCount() const { return 0; }
+  int OpCount() const { return 0; }
 };
 
 }  // namespace cc
 
 #endif  // CC_PAINT_FLOAT_CLIP_DISPLAY_ITEM_H_