Add use_allocator instead of linux_use_tcmalloc to switch the allocator.

gpu/gpu.gyp

Index: gpu/gpu.gyp
diff --git a/gpu/gpu.gyp b/gpu/gpu.gyp
index 477e62a2f92ac09ed70995c3e2d6485747f40bf9..322a3c09a68357037d1c33c322e156841659479c 100644
--- a/gpu/gpu.gyp
+++ b/gpu/gpu.gyp
@@ -264,7 +264,8 @@
           ],
         }],
         # See http://crbug.com/162998#c4 for why this is needed.
-        ['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': [
             '../base/allocator/allocator.gyp:allocator',
           ],