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

remoting/remoting_host_linux.gypi

 # Copyright 2014 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.
 
 {
   'conditions': [
     ['OS=="linux" and branding=="Chrome" and enable_remoting_host==1', {
       'variables': {
         'build_deb_script': 'host/installer/linux/build-deb.sh',
         'deb_filename': 'host/installer/<!(["<(build_deb_script)", "-p", "-s", "<(DEPTH)"])',
@@ skipping 110 matching lines @@
           'type': 'executable',
           'dependencies': [
             'remoting_host_setup_base',
           ],
           'sources': [
             'host/setup/host_starter.cc',
             'host/setup/host_starter.h',
             'host/setup/start_host.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',
               ],
             }],
           ],
         },  # end of target 'remoting_start_host'
       ],  # end of 'targets'
     }],  # 'OS=="linux"'
 
   ],  # end of 'conditions'
 }