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

components/components_tests.gyp

 # Copyright 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.
 
 {
   'variables': {
     # This turns on e.g. the filename-based detection of which
     # platforms to include source files on (e.g. files ending in
     # _mac.h or _mac.cc are only compiled on MacOSX).
     'chromium_code': 1,
@@ skipping 418 matching lines @@
               'dependencies': [
                 '../dbus/dbus.gyp:dbus',
                 '../device/media_transfer_protocol/media_transfer_protocol.gyp:device_media_transfer_protocol',
               ],
             }],
             ['OS=="win" and win_use_allocator_shim==1', {
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
             }],
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['OS=="linux" and component=="shared_library" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
+            ['OS=="linux" and component=="shared_library" and use_allocator!="none"', {
             'dependencies': [
                 '<(DEPTH)/base/allocator/allocator.gyp:allocator',
             ],
             'link_settings': {
                 'ldflags': ['-rdynamic'],
             },
             }],
             ['configuration_policy==1', {
               'dependencies': [
                 'components.gyp:policy_component',
@@ skipping 233 matching lines @@
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }