Further plumb visual rect into cc:DisplayItemList.

ui/compositor/clip_recorder.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 UI_COMPOSITOR_CLIP_RECORDER_H_
 #define UI_COMPOSITOR_CLIP_RECORDER_H_
 
 #include "base/macros.h"
 #include "ui/compositor/compositor_export.h"
+#include "ui/gfx/geometry/rect.h"
 
 namespace cc {
 class DisplayItem;
 class DisplayItemList;
 }
 
 namespace gfx {
 class Path;
-class Rect;
+class Size;
 }
 
 namespace ui {
 class PaintContext;
 
 // A class to provide scoped clips of painting to a DisplayItemList. The clip
 // provided will be applied to any DisplayItems added to the DisplayItemList
 // while this object is alive. In other words, any nested PaintRecorders or
 // other ClipRecorders will be clipped.
 class COMPOSITOR_EXPORT ClipRecorder {
  public:
-  explicit ClipRecorder(const PaintContext& context);
+  // |size_in_layer| is the size in layer space dimensions surrounding
+  // everything that's visible.
+  ClipRecorder(const PaintContext& context, const gfx::Size& size_in_layer);
   ~ClipRecorder();
 
   void ClipRect(const gfx::Rect& clip_rect);
   void ClipPath(const gfx::Path& clip_path);
   void ClipPathWithAntiAliasing(const gfx::Path& clip_path);
 
  private:
   enum Closer {
     CLIP_RECT,
     CLIP_PATH,
   };
   const PaintContext& context_;
+  const gfx::Rect bounds_in_layer_;
   // If someone needs to do more than this many operations with a single
   // ClipRecorder then increase the size of the closers_ array.
   Closer closers_[4];
   size_t num_closers_;
 
   DISALLOW_COPY_AND_ASSIGN(ClipRecorder);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_CLIP_RECORDER_H_