Revert r22080 and re-enable tcmalloc.

build/all.gyp

 # 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.
 
 {
   'includes': [
     'common.gypi',
   ],
   'targets': [
     {
@@ skipping 57 matching lines @@
           'dependencies': [
             '../breakpad/breakpad.gyp:*',
             '../chrome/app/locales/locales.gyp:*',
             '../courgette/courgette.gyp:*',
             '../gears/gears.gyp:*',
             '../rlz/rlz.gyp:*',
             '../sandbox/sandbox.gyp:*',
             '../third_party/bsdiff/bsdiff.gyp:*',
             '../third_party/bspatch/bspatch.gyp:*',
             '../third_party/cld/cld.gyp:*',
+            '../third_party/tcmalloc/tcmalloc.gyp:*',
             '../tools/memory_watcher/memory_watcher.gyp:*',
             '../webkit/activex_shim/activex_shim.gyp:*',
             '../webkit/activex_shim_dll/activex_shim_dll.gyp:*',
           ],
         }, {
           'dependencies': [
             '../third_party/libevent/libevent.gyp:*',
           ],
         }],
         ['OS=="win" or (OS=="linux" and toolkit_views==1)', {
@@ skipping 23 matching lines @@
           'type': 'none',
           'dependencies': [
             'All',
             '../chrome/chrome.gyp:build_app_dmg',
           ],
         },
       ],
     }],
   ],
 }