mac: In static library builds, link against a static libc++.a

chrome/chrome_dll.gypi

Index: chrome/chrome_dll.gypi
diff --git a/chrome/chrome_dll.gypi b/chrome/chrome_dll.gypi
index ef6188778a75ae6d9c4c8a8306d7c6902e7dac67..b0422e4f6669a27b0763f7f14542a7dc3c23e568 100644
--- a/chrome/chrome_dll.gypi
+++ b/chrome/chrome_dll.gypi
@@ -304,7 +304,7 @@
               ],
             }],
             # This step currently fails when using LTO. TODO(pcc): Re-enable.
-            ['OS=="mac" and use_lto==0', {
+            ['OS=="mac" and use_lto==0 and component=="static_library" and asan==0', {
               'postbuilds': [
                 {
                   # This step causes an error to be raised if the .order file