On mac, I ran: 
git checkout v1.3.3 
./bootstrap.py 
CXX=path/to/chromiums/clang++ ./configure --with-gtest=path/to/gtest 
./ninja ninja_test 
./ninja_test # all passed 
strip ninja 

Empty build perf is ~7% slower (https://github.com/martine/ninja/issues/544), 
but this allows us to enable deps mode by default which will make empty builds 
twice as fast. 

Mac binary size grew by ~16kB. 

The linux binaries were built by thestig@chromium.org. 
The windows binary was built by scottmg@chromium.org. 

New stuff since 1.1: 
- NINJA_STATUS now allows %e, for elapsed time. 
- "pool" feature 
- "compdb" tool for writing clang compilation databases 
- faster deps mode (needs to be explicitly enabled in gyp, not done yet) 

BUG=241628
Review URL: https://codereview.chromium.org/15490003



git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@201143 0039d316-1c4b-4281-b951-d872f2087c98