Make code compile with clang_use_chrome_plugin (final)

xfa/fde/css/fde_csscache.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "xfa/fde/css/fde_csscache.h"
 
 #include <algorithm>
 
@@ skipping 38 matching lines @@
     : pTag(it.pTag),
       pParent(it.pParent),
       dwIDHash(it.dwIDHash),
       dwTagHash(it.dwTagHash),
       iClassIndex(0),
       dwClassHashs(1) {
   if (it.dwClassHashs.GetSize() > 0)
     dwClassHashs.Copy(it.dwClassHashs);
 }
 
+FDE_CSSTagCache::~FDE_CSSTagCache() {}
+
+CFDE_CSSAccelerator::CFDE_CSSAccelerator() {}
+
+CFDE_CSSAccelerator::~CFDE_CSSAccelerator() {}
+
 void CFDE_CSSAccelerator::OnEnterTag(CXFA_CSSTagProvider* pTag) {
   FDE_CSSTagCache* pTop = GetTopElement();
   FDE_CSSTagCache item(pTop, pTag);
   m_Stack.Push(item);
 }
 
 void CFDE_CSSAccelerator::OnLeaveTag(CXFA_CSSTagProvider* pTag) {
   ASSERT(m_Stack.GetTopElement());
   ASSERT(m_Stack.GetTopElement()->GetTag() == pTag);
   m_Stack.Pop();
 }