FBTF: Fix more ctor/dtors found by clang plugin.

gpu/command_buffer/service/id_manager.cc

 // Copyright (c) 2010 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 "gpu/command_buffer/service/id_manager.h"
 #include "base/logging.h"
 
 namespace gpu {
 namespace gles2 {
 
+IdManager::IdManager() {}
+
+IdManager::~IdManager() {}
+
 bool IdManager::AddMapping(GLuint client_id, GLuint service_id) {
   std::pair<MapType::iterator, bool> result = id_map_.insert(
       std::make_pair(client_id, service_id));
   return result.second;
 }
 
 bool IdManager::RemoveMapping(GLuint client_id, GLuint service_id) {
   MapType::iterator iter = id_map_.find(client_id);
   if (iter != id_map_.end() && iter->second == service_id) {
     id_map_.erase(iter);
@@ skipping 23 matching lines @@
       return true;
     }
   }
   return false;
 }
 
 }  // namespace gles2
 }  // namespace gpu