No need to include ../tools/flags in include_dirs when depending on flags target.

"flags" target does it by direct_dependent_settings which exports the
include_dirs to targets that depend on it.

Along the way fixed the indentation of experimental.gyp and v8.gyp.

BUG=None
TEST=make all
R=mtklein@google.com

Author: tfarina@chromium.org

Review URL: https://codereview.chromium.org/343283002
6 files changed