Move a bunch of code in content\common (as well as a few left in renderer) to the content namespace.

content/common/gpu/sync_point_manager.h

 // Copyright (c) 2012 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 CONTENT_COMMON_GPU_SYNC_POINT_MANAGER_H_
 #define CONTENT_COMMON_GPU_SYNC_POINT_MANAGER_H_
 
 #include <vector>
 
 #include "base/callback.h"
 #include "base/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread_checker.h"
 
+namespace content {
+
 // This class manages the sync points, which allow cross-channel
 // synchronization.
 class SyncPointManager : public base::RefCountedThreadSafe<SyncPointManager> {
  public:
   SyncPointManager();
 
   // Generates a sync point, returning its ID. This can me called on any thread.
   // IDs start at 1.
   uint32 GenerateSyncPoint();
 
@@ skipping 18 matching lines @@
 
   // Protects the 2 fields below. Note: callbacks shouldn't be called with this
   // held.
   base::Lock lock_;
   SyncPointMap sync_point_map_;
   uint32 next_sync_point_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncPointManager);
 };
 
+}  // namespace content
+
 #endif  // CONTENT_COMMON_GPU_SYNC_POINT_MANAGER_H_