Remove {linux|android}_use_tcmalloc and switch to use_allocator in Chromium.

ui/ui_unittests.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 152 matching lines @@
         }],
         ['use_pango == 1', {
           'dependencies': [
             '../build/linux/system.gyp:fontconfig',
             '../build/linux/system.gyp:pangocairo',
           ],
           'sources': [
             'gfx/platform_font_pango_unittest.cc',
           ],
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+            ['use_allocator!="none"', {
                'dependencies': [
                  '../base/allocator/allocator.gyp:allocator',
                ],
             }],
           ],
         }],
         ['use_x11==1', {
           'dependencies': [
             '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
           ],
@@ skipping 92 matching lines @@
           ],
           'variables': {
             'test_suite_name': 'ui_unittests',
           },
           'includes': [ '../build/apk_test.gypi' ],
         },
       ],
     }],
   ],
 }