sync: Cleanups in and around directory.h

- Remove MockDirectorySyncerCommand (not used).
- Remove MockDirectory (used only by MockDirectorySyncerCommand).
- Remove Directory::InitKernelForTest (used only by MockDirectory).
- Merge ChildHandles and UnsyncedMetahandles typedefs into a single
  Metahandles typedef.
- Rearrange declarations in directory.h to match Google C++ style.
- Create scoped_kernel_lock.cc; move related definitions from
  directory.cc to this new file.
- Use DISALLOW_COPY_AND_ASSIGN instead of declaring an undefined
  Directory::operator= manually.

BUG=245931

Review URL: https://chromiumcodereview.appspot.com/16591002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@204828 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 19 insertions, 0 deletions

diff --git a/sync/syncable/scoped_kernel_lock.cc b/sync/syncable/scoped_kernel_lock.cc
new file mode 100644
index 0000000..4a27420
--- /dev/null
+++ b/sync/syncable/scoped_kernel_lock.cc
@@ -0,0 +1,19 @@
+// 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 "sync/syncable/scoped_kernel_lock.h"
+
+#include "sync/syncable/directory.h"
+
+namespace syncer {
+namespace syncable {
+
+ScopedKernelLock::ScopedKernelLock(const Directory* dir)
+  :  scoped_lock_(dir->kernel_->mutex), dir_(const_cast<Directory*>(dir)) {
+}
+
+ScopedKernelLock::~ScopedKernelLock() {}
+
+}  // namespace syncable
+}  // namespace syncer