Add use_allocator instead of linux_use_tcmalloc to switch the allocator.

ui/events/events.gyp

Index: ui/events/events.gyp
diff --git a/ui/events/events.gyp b/ui/events/events.gyp
index c3965e78d9f57928a391a66e9982c97277d76650..5007fd3e8623518cf5bd7cbe0e678c2ce9638254 100644
--- a/ui/events/events.gyp
+++ b/ui/events/events.gyp
@@ -283,7 +283,8 @@
         'x/events_x_unittest.cc',
       ],
       'conditions': [
-        ['OS=="linux" and linux_use_tcmalloc==1', {
+        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
+        ['OS=="linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
           'dependencies': [
             '<(DEPTH)/base/allocator/allocator.gyp:allocator',
           ],