Strip unit_tests on Linux 32-bit official builds.

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index f78023f05a98cb0cbb088ebcccd563c45213b6b4..75413ede3bfd8bdbcb46cf249b61bd8aadd5e450 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -2269,6 +2269,15 @@
             '../ui/aura/aura.gyp:test_support_aura',
           ],
         }],
+        ['OS=="linux" and buildtype=="Official" and target_arch=="ia32"', {
+          'configurations': {
+            'Release': {
+              'ldflags': [
+                '-Wl,--strip-debug',
+              ],
+            },
+          },
+        }],
         ['os_posix == 1 and OS != "mac" and OS != "android"', {
           'conditions': [
             ['linux_use_tcmalloc==1', {