Make net_unittests_run work with component=shared_library.

build/linux/system.isolate

Index: build/linux/system.isolate
diff --git a/build/linux/system.isolate b/build/linux/system.isolate
index 79fa36b7b3e53ebcf2f627c39775b447d4fedb54..3933af1e2ee9a0c0069775e6536cfdb2d7817b1b 100644
--- a/build/linux/system.isolate
+++ b/build/linux/system.isolate
@@ -2,7 +2,11 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 {
+  # This file is only used with the condition "desktop_linux==1 or chromeos==1".

[Vadim Sh., 2014/01/29 19:26:46]

I don't see where this is enforced/defined... base.isolate unconditionally
includes system.isolate.

[M-A Ruel, 2014/01/29 21:48:56]

It is really just informative to help correlate with how base.gyp imports
system.gyp.

   'includes': [
+    # This is only used when use_openssl==0.
+    # TODO(rsleevi): This is awkward, because this file is imported from
+    # base.isolate but references net, causing an improper import cycle.
     '../../net/third_party/nss/ssl.isolate',
   ],
 }