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

gpu/command_buffer/common/id_allocator.cc

 // Copyright (c) 2009 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.
 
 // This file contains the implementation of IdAllocator.
 
 #include "../common/id_allocator.h"
 #include "../common/logging.h"
 
 namespace gpu {
 
-IdAllocator::IdAllocator() {
+IdAllocator::IdAllocator() {}
+
+IdAllocator::~IdAllocator() {}
+
+ResourceId IdAllocator::AllocateID() {
+  ResourceId id = FindFirstFree();
+  MarkAsUsed(id);
+  return id;
+}
+
+ResourceId IdAllocator::AllocateIDAtOrAbove(ResourceId desired_id) {
+  GPU_DCHECK_LT(static_cast<ResourceId>(used_ids_.size()),
+            static_cast<ResourceId>(-1));
+  for (; InUse(desired_id); ++desired_id) {}
+  MarkAsUsed(desired_id);
+  return desired_id;
+}
+
+bool IdAllocator::MarkAsUsed(ResourceId id) {
+  std::pair<ResourceIdSet::iterator, bool> result = used_ids_.insert(id);
+  return result.second;
+}
+
+void IdAllocator::FreeID(ResourceId id) {
+  used_ids_.erase(id);
+}
+
+bool IdAllocator::InUse(ResourceId id) const {
+  return id == kInvalidResource || used_ids_.find(id) != used_ids_.end();
 }
 
 ResourceId IdAllocator::FindFirstFree() const {
   ResourceId id = 1;
   for (ResourceIdSet::const_iterator it = used_ids_.begin();
        it != used_ids_.end(); ++it) {
     if ((*it) != id) {
       return id;
     }
     ++id;
   }
   return id;
 }
 
-ResourceId IdAllocator::AllocateIDAtOrAbove(ResourceId desired_id) {
-  GPU_DCHECK_LT(static_cast<ResourceId>(used_ids_.size()),
-            static_cast<ResourceId>(-1));
-  for (; InUse(desired_id); ++desired_id) {}
-  MarkAsUsed(desired_id);
-  return desired_id;
-}
-
 }  // namespace gpu