* This enables 5 performance related checks:
performance-faster-string-find
performance-for-range-copy
performance-implicit-cast-in-loop
performance-unnecessary-copy-initialization
performance-unnecessary-value-param
* Recognize these new warnings in warn.py.
Bug: http://b/27779618
Change-Id: I7af3fdc262dd44db90d3b62eb37c5eac5a2eaa01
Test: build with WITH_TIDY=1 and run warn.py with build.log
c868293abc