Revert "Delete CC."

cc/resources/shared_bitmap.h

+// Copyright 2013 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_SHARED_BITMAP_H_
+#define CC_RESOURCES_SHARED_BITMAP_H_
+
+#include "base/basictypes.h"
+#include "gpu/command_buffer/common/mailbox.h"
+#include "ui/gfx/geometry/size.h"
+
+namespace cc {
+typedef gpu::Mailbox SharedBitmapId;
+
+class SharedBitmap {
+ public:
+  SharedBitmap(uint8* pixels, const SharedBitmapId& id);
+
+  virtual ~SharedBitmap();
+
+  uint8* pixels() { return pixels_; }
+
+  const SharedBitmapId& id() { return id_; }
+
+  // Returns true if the size is valid and false otherwise.
+  static bool SizeInBytes(const gfx::Size& size, size_t* size_in_bytes);
+  // Dies with a CRASH() if the size can not be represented as a positive number
+  // of bytes.
+  static size_t CheckedSizeInBytes(const gfx::Size& size);
+  // Returns the size in bytes but may overflow or return 0. Only do this for
+  // sizes that have already been checked.
+  static size_t UncheckedSizeInBytes(const gfx::Size& size);
+  // Returns true if the size is valid and false otherwise.
+  static bool VerifySizeInBytes(const gfx::Size& size);
+
+  static SharedBitmapId GenerateId();
+
+ private:
+  uint8* pixels_;
+  SharedBitmapId id_;
+
+  DISALLOW_COPY_AND_ASSIGN(SharedBitmap);
+};
+
+}  // namespace cc
+
+#endif  // CC_RESOURCES_SHARED_BITMAP_H_