Add CHROMIUM_CXX_TWEAK_INLINES to reduce binary size

Experimented with std::vector & std::string, and ended up shrinking
libchrome.so by 728kb (2% of .text)

Used system health trybots and found no difference in the
(fairly noisy) metrics:
https://docs.google.com/document/d/11v5NDuk_CgG7b3rxWdxt-LZu8QDWgfTa3NuWg3i7mmc/edit

Bug: 738155
Change-Id: Ib3962e3a9d3ca11c51f4815fa8e26182300a9905
Reviewed-on: https://chromium-review.googlesource.com/676666
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Tested-by: Andrew Grieve <agrieve@chromium.org>
6 files changed