Remove stale 'virtual' in DiscardableMemoryAllocator.

base/memory/discardable_memory_allocator_android.cc

 // 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 "base/memory/discardable_memory_allocator_android.h"
 
 #include <algorithm>
 #include <cmath>
 #include <set>
 #include <utility>
@@ skipping 106 matching lines @@
       const std::string& name,
       DiscardableMemoryAllocator* allocator) {
     DCHECK_EQ(size, AlignToNextPage(size));
     int fd;
     void* base;
     if (!internal::CreateAshmemRegion(name.c_str(), size, &fd, &base))
       return scoped_ptr<AshmemRegion>();
     return make_scoped_ptr(new AshmemRegion(fd, size, base, allocator));
   }
 
-  virtual ~AshmemRegion() {
+  ~AshmemRegion() {
     const bool result = internal::CloseAshmemRegion(fd_, size_, base_);
     DCHECK(result);
   }
 
   // Returns a new instance of DiscardableMemory whose size is greater or equal
   // than |actual_size| (which is expected to be greater or equal than
   // |client_requested_size|).
   // Allocation works as follows:
   // 1) Reuse a previously freed chunk and return it if it succeeded. See
   // ReuseFreeChunk_Locked() below for more information.
@@ skipping 304 matching lines @@
   DCHECK_LE(ashmem_regions_.size(), 5U);
   const ScopedVector<AshmemRegion>::iterator it = std::find(
       ashmem_regions_.begin(), ashmem_regions_.end(), region);
   DCHECK_NE(ashmem_regions_.end(), it);
   std::swap(*it, ashmem_regions_.back());
   ashmem_regions_.pop_back();
 }
 
 }  // namespace internal
 }  // namespace base