tree d56c94d90234cc6c8cd53d677d3cec6e95cd46ac
parent 94dd7a52d3fe0632cd830f2e9cd14103c2726aac
author scroggo <scroggo@google.com> 1444834474 -0700
committer Commit bot <commit-bot@chromium.org> 1444834474 -0700

Supply separate flags for onBuildTileIndex

Since png and jpeg's implementations of onBuildTileIndex rely on
modifications to their underlying libraries, rather than whether we are
running on Android, use separate flags that can be disabled
independently.

This will allow us to easily turn off the feature. It also is a step
towards building and running on other platforms for testing (e.g.
valgrind/ASAN to find memory leaks etc).

Review URL: https://codereview.chromium.org/1401283003