Revert "Delete CC."

cc/resources/texture_mailbox.cc

+// 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.
+
+#include "cc/resources/texture_mailbox.h"
+
+#include "base/logging.h"
+#include "cc/resources/shared_bitmap.h"
+
+namespace cc {
+
+TextureMailbox::TextureMailbox() : shared_bitmap_(NULL) {
+}
+
+TextureMailbox::TextureMailbox(const gpu::MailboxHolder& mailbox_holder)
+    : mailbox_holder_(mailbox_holder),
+      shared_bitmap_(NULL),
+      allow_overlay_(false),
+      nearest_neighbor_(false) {
+}
+
+TextureMailbox::TextureMailbox(const gpu::Mailbox& mailbox,
+                               uint32 target,
+                               uint32 sync_point)
+    : mailbox_holder_(mailbox, target, sync_point),
+      shared_bitmap_(NULL),
+      allow_overlay_(false),
+      nearest_neighbor_(false) {
+}
+
+TextureMailbox::TextureMailbox(SharedBitmap* shared_bitmap,
+                               const gfx::Size& size)
+    : shared_bitmap_(shared_bitmap),
+      shared_memory_size_(size),
+      allow_overlay_(false),
+      nearest_neighbor_(false) {
+  // If an embedder of cc gives an invalid TextureMailbox, we should crash
+  // here to identify the offender.
+  CHECK(SharedBitmap::VerifySizeInBytes(shared_memory_size_));
+}
+
+TextureMailbox::~TextureMailbox() {}
+
+bool TextureMailbox::Equals(const TextureMailbox& other) const {
+  if (other.IsTexture()) {
+    return IsTexture() && !memcmp(mailbox_holder_.mailbox.name,
+                                  other.mailbox_holder_.mailbox.name,
+                                  sizeof(mailbox_holder_.mailbox.name));
+  } else if (other.IsSharedMemory()) {
+    return IsSharedMemory() && (shared_bitmap_ == other.shared_bitmap_);
+  }
+
+  DCHECK(!other.IsValid());
+  return !IsValid();
+}
+
+size_t TextureMailbox::SharedMemorySizeInBytes() const {
+  // UncheckedSizeInBytes is okay because we VerifySizeInBytes in the
+  // constructor and the field is immutable.
+  return SharedBitmap::UncheckedSizeInBytes(shared_memory_size_);
+}
+
+}  // namespace cc