Route calls to tcmalloc MallocExtension through allocator agnostic interface

chrome/browser/memory_purger.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 "chrome/browser/memory_purger.h"
 
 #include <set>
 
+#include "base/allocator/allocator_extension.h"
 #include "base/bind.h"
 #include "base/threading/thread.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/history/history.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/webdata/web_data_service.h"
 #include "chrome/common/render_messages.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/resource_context.h"
 #include "net/proxy/proxy_resolver.h"
 #include "net/proxy/proxy_service.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_context_getter.h"
-#include "third_party/tcmalloc/chromium/src/gperftools/malloc_extension.h"
 
 using content::BrowserContext;
 using content::BrowserThread;
 using content::ResourceContext;
 
 // PurgeMemoryHelper -----------------------------------------------------------
 
 // This is a small helper class used to ensure that the objects we want to use
 // on multiple threads are properly refed, so they don't get deleted out from
 // under us.
@@ skipping 84 matching lines @@
 
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&PurgeMemoryIOHelper::PurgeMemoryOnIOThread,
                  purge_memory_io_helper.get()));
 
   // TODO(pkasting):
   // * Purge AppCache memory.  Not yet implemented sufficiently.
   // * Browser-side DatabaseTracker.  Not implemented sufficiently.
 
-#if !defined(OS_MACOSX) && defined(USE_TCMALLOC)
-  // Tell tcmalloc to release any free pages it's still holding.
+  // Tell our allocator to release any free pages it's still holding.
   //
   // TODO(pkasting): A lot of the above calls kick off actions on other threads.
   // Maybe we should find a way to avoid calling this until those actions
   // complete?
-  MallocExtension::instance()->ReleaseFreeMemory();
-#endif
+  base::allocator::ReleaseFreeMemory();
 }
 
 // static
 void MemoryPurger::PurgeRenderers() {
   // Direct all renderers to free everything they can.
   //
   // Concern: Telling a bunch of renderer processes to destroy their data may
   // cause them to page everything in to do it, which could take a lot of time/
   // cause jank.
   for (content::RenderProcessHost::iterator i(
           content::RenderProcessHost::AllHostsIterator());
        !i.IsAtEnd(); i.Advance())
     PurgeRendererForHost(i.GetCurrentValue());
 }
 
 // static
 void MemoryPurger::PurgeRendererForHost(content::RenderProcessHost* host) {
   // Direct the renderer to free everything it can.
   host->Send(new ChromeViewMsg_PurgeMemory());
 }