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

chrome/chrome_exe.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'chrome',
       'type': 'none',
       'dependencies': [ 'chrome_initial', ],
@@ skipping 123 matching lines @@
                 'app/resources/manpage.1.in',
                 '<@(_outputs)',
                 '-e', 's/@@NAME@@/<(name)/',
                 '-e', 's/@@FILENAME@@/<(filename)/',
                 '-e', 's/@@CONFDIR@@/<(confdir)/',
               ],
               'message': 'Generating manpage'
             },
           ],
           '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': [
                   '<(allocator_target)',
                 ],
               },
             ],
             ['profiling==0 and linux_disable_pie==0', {
               'ldflags': [
                 '-pie',
               ],
             }],
@@ skipping 530 matching lines @@
               'dependencies': [
                 'chrome_nacl_win64',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }