TabContents -> WebContentsImpl, part 19.

content/browser/renderer_host/backing_store_manager.cc

 // 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.
 
 #include "content/browser/renderer_host/backing_store_manager.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/memory/mru_cache.h"
 #include "base/sys_info.h"
@@ skipping 110 matching lines @@
   }
 
   // TODO(erikkay) 32bpp is not always accurate
   size_t new_mem = backing_store_size.GetArea() * 4;
   size_t current_mem = BackingStoreManager::MemorySize();
   size_t max_mem = MaxBackingStoreMemory();
   DCHECK(new_mem < max_mem);
   if (current_mem + new_mem > max_mem) {
     // Need to remove old backing stores to make room for the new one. We
     // don't want to do this when the backing store is being replace by a new
-    // one for the same tab, but this case won't get called then: we'll have
-    // removed the old one in the RemoveBackingStore above, and the cache
+    // one for the same WebContents, but this case won't get called then: we'll
+    // have removed the old one in the RemoveBackingStore above, and the cache
     // won't be over-sized.
     CreateCacheSpace((current_mem + new_mem) - max_mem);
   }
   DCHECK((BackingStoreManager::MemorySize() + new_mem) <= max_mem);
 
   BackingStoreCache* cache;
   if (new_mem > kSmallThreshold) {
     // Limit the number of large backing stores (tabs) to the memory tier number
     // (between 2-5). While we allow a larger amount of memory for people who
     // have large windows, this means that those who use small browser windows
@@ skipping 128 matching lines @@
   size_t mem = 0;
   BackingStoreCache::iterator it;
   for (it = large_cache->begin(); it != large_cache->end(); ++it)
     mem += it->second->MemorySize();
 
   for (it = small_cache->begin(); it != small_cache->end(); ++it)
     mem += it->second->MemorySize();
 
   return mem;
 }