Cosmetic cleanup to texture_layer mailboxes.

cc/texture_mailbox.cc

Index: cc/texture_mailbox.cc
diff --git a/cc/texture_mailbox.cc b/cc/texture_mailbox.cc
new file mode 100644
index 0000000000000000000000000000000000000000..861b4596494a7446a3d5f74faeb5bc2507c921d1
--- /dev/null
+++ b/cc/texture_mailbox.cc
@@ -0,0 +1,52 @@
+// 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 "base/logging.h"
+#include "cc/texture_mailbox.h"
+
+namespace cc {
+
+TextureMailbox::TextureMailbox() {
+}
+
+TextureMailbox::TextureMailbox(
+    const std::string& mailbox_name,
+    const ReleaseCallback& mailbox_callback)
+    : callback_(mailbox_callback) {
+  DCHECK(mailbox_name.empty() == mailbox_callback.is_null());
+  if (!mailbox_name.empty()) {
+    DCHECK(mailbox_name.size() == sizeof(name_.name));

[piman, 2013/01/17 21:30:01]

nit: could you make this a CHECK? If the check fails (because we missed
validation upstream), better crash safely than let an OOB read happen right
below.

[alexst (slow to review), 2013/01/17 22:10:11]

Done.

+    name_.setName(reinterpret_cast<const int8*>(mailbox_name.data()));
+  }
+}
+
+TextureMailbox::TextureMailbox(
+    const Mailbox& mailbox_name,
+    const ReleaseCallback& mailbox_callback)
+    : callback_(mailbox_callback) {
+  DCHECK(mailbox_name.isZero() == mailbox_callback.is_null());
+  name_.setName(mailbox_name.name);
+}
+
+TextureMailbox::~TextureMailbox() {
+}
+
+bool TextureMailbox::Equals(const TextureMailbox& other) const {
+  return !memcmp(data(), other.data(), sizeof(name_.name));
+}
+
+bool TextureMailbox::IsEmpty() const {
+  return name_.isZero();
+}
+
+void TextureMailbox::RunReleaseCallback(unsigned sync_point) const {
+  if (!callback_.is_null())
+    callback_.Run(sync_point);
+}
+
+void TextureMailbox::SetName(const int8* data) {
+  name_.setName(data);
+}
+
+}  // namespace cc