Gentoo's Bugzilla –
Attachment 386646 Details for
Bug 525374www-client/chromium-39.0.2171.19 with sys-devel/gcc:4.7: In file included from ../../mojo/public/cpp/bindings/lib/connector.cc:5: ../../mojo/public/c/system/types.h:169:8: error: expected unqualified-id before numeric constant