BSP Tree perf tests to match LayerSorter perf tests

The BspTree perf tests should ideally perform equally or better than the
current LayerSorter tests do in the same tests (i.e. "rubik" vs.
"rubik").

Performance results on Z600:
layer_sort_cubes= 3.547ms
layer_sort_rubik= 0.634ms
bsp_tree_cubes= 1.485ms
bsp_tree_rubik= 0.136ms
bsp_tree_cubes_2= 2.915ms (2x duplicated layers)
bsp_tree_cubes_4= 5.667ms (4x duplicated layers)

BUG=230833

Review URL: https://codereview.chromium.org/416273002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287182 0039d316-1c4b-4281-b951-d872f2087c98

• cc/BUILD.gn[diff]
• cc/base/math_util.cc[diff]
• cc/base/math_util.h[diff]
• cc/quads/draw_polygon.cc[diff]
• cc/quads/draw_polygon.h[diff]
• cc/trees/layer_tree_host_common_perftest.cc[diff]