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

content/content_app.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.
 
 {
   'include_dirs': [
     '..',
   ],
   'dependencies': [
     '../base/base.gyp:base',
@@ skipping 17 matching lines @@
     'app/mojo/mojo_init.h',
     'app/startup_helper_win.cc',
     'public/app/android_library_loader_hooks.h',
     'public/app/content_main.h',
     'public/app/content_main_delegate.cc',
     'public/app/content_main_delegate.h',
     'public/app/content_main_runner.h',
     'public/app/startup_helper_win.h',
   ],
   'conditions': [
-    # TODO(dmikurube): Kill {linux|android}_use_tcmalloc. http://crbug.com/345554
-    ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and ((OS=="linux" and os_posix==1 and use_aura==1 and linux_use_tcmalloc==1) or (OS=="android" and android_use_tcmalloc==1)))', {
+    ['((OS=="linux" and os_posix==1 and use_aura==1) or OS=="android") and use_allocator!="none"', {
       'dependencies': [
         # This is needed by app/content_main_runner.cc
         '../base/allocator/allocator.gyp:allocator',
       ],
     }],
     ['OS=="win"', {
       'dependencies': [
         '../sandbox/sandbox.gyp:sandbox',
       ],
     }],
@@ skipping 18 matching lines @@
     }, {  # OS!="ios"
       'dependencies': [
         '../mojo/mojo.gyp:mojo_environment_chromium',
         '../mojo/mojo.gyp:mojo_service_manager',
         '../mojo/mojo.gyp:mojo_shell_bindings',
         '../mojo/mojo.gyp:mojo_system_impl',
      ],
     }],
   ],
 }